Best practice electric vehicle (EV) charging for low mileage drivers

[@MarksElectricLife]

This video is made with a specific audience in mind, EV owners who drive less than 25 miles or 40kms each day and charge at home. Statistics suggest that is the majority of commuters in developed countries. If it's not you then feel free to skip to the next video. Please don’t punch your computer screen and post angry comments as I will just take them down. I’m sure you can find better use of your time. The testing data pertains to "ternary" chemistry (e.g. NMC, NCA) and not LFP. Also note that a "DST Cycle" referred to in the Battery University study means one discharge and recharge to the levels specified in the test (e.g 75% - 65% SOC). However the industry term "cycle", when used to predict battery life, means one transition from fully charged to fully discharged and back to fully charged. So there would be 10 X 75% - 65% events before one charge "cycle" is clocked against the battery's lifetime cycle count. Key takeaways: 1. Most EVs allow you to set the maximum state of charge (SOC). You don’t have to choose 90% 2. Testing conducted by independent labs shows that leaving lithium-ion batteries at a high SOC for prolonged periods can shorten their life 3. Li-ion batteries are least stressed when at 50% SOC, which is why most products are shipped at 50% SOC 4. If you only use 10% (or less) of your battery capacity each day then there is no need to top it up to 90% each night. Indeed this could be counter-productive since your battery will reach 90% after an hour or so and then stand fully charged for up to 12 hours in your garage. 5. If you only need 10% for your daily drive then I recommend you drop your maximum SOC to allow for this (maybe 60%). You can always increase it whenever you are planning to drive further in a day. 6. You don’t have to follow this advice. Your battery, your choice. But this is a no-regrets approach since worst case it will make no difference to your battery life and best case it will enhance it. Data is sourced from The Battery University and Chalmers University of Technology.

[@justinbrown9680]

Thanks Mark. I learned a lot that I never knew before as I tried to understand the material you presented. I apologize if I wasted your time with unnecessary comments, but I can assure you I learned alot and am glad I took the time to try to understand. Without your video, I never would have found Evelina Wikner and all the great work she has done on your theme: reducing maximum state of charge. Thank you.

[@DataGeek903]

if 55-65% gives you say 5,000 cycles is that 5,000 x 10% x 100kWh = 50,000 kWh life. if 30-80% gives you say 1,500 cycles that is 1,500 x 50% x 100kWh = 75,000 kWh life. Or is the cycle defined as a full capacity DoD equivalent?

[@23davil]

It stands to sense that if you try and pull too much energy out of a battery eg going up steep hills on low battery capacity ur going g to twist the cells. Resulting in that when you try to charge it its twisting the cells. You have to have respect for your battery as you would do a load carrying mule.

[@duigiud]

How many miles can you drive on 10%? How do you figure out battery percentage to miles?

[@authorified89]

​@@duigiuddepends on the car. Your EV can show an average usage for a certain mileage. If you know how big your battery is and your own usage per mile, then you can calculate how many miles you drive in 10%

[@Rdhog]

Good information here about charging your EV to fit the typical use for extending the battery life. My model S is almost 9 years old now. My commute is around 30 miles or so a day. I plug in whenever I park in the garage and have the charge set to 60%, the normal charge left at the end of my day is a little over 40%. The battery is still well over 90% capacity after almost 9 years. If I plan on a longer drive I up the charge for the next day or if an unexpected long drive is needed I stop by the local Supercharger for a few minutes. No range anxiety at all. The car is ready to go each day and no gas station stops.

[@jensn6490]

People are missing the fact that one cycle is equal to running through the full kWh of your battery, it’s not the number of charge sessions, it’s the number of times you can charge your battery all the way up and deplete it to 0%. Charging from 65% to 75% over ten different charging sessions is the equivalent of 1 cycle on the graph.

[@tolrem]

Interesting that.

[@clementenucita2325]

thats what i though , for example Peugeot garantie the batteries 1500 cycles , I translate that as 450 000 km for a car with 300km autonomie

[@jensn6490]

@@clementenucita2325 you are correct. If it’s a nickel manganese cobalt pack try to keep it close to 50% and you’ll probably get 1,609,344 km or 1 million miles!

[@paulgojenola1278]

A couple of things that would help the analysis. First, even though the curves are super useful the typical end of useful life of Lithium Ion batteries is ~80% because there is a ‘knee’ in the curve and capacity falls off much faster after that. But that data takes much longer to collect. Second, to calculate the years of life of the battery you need to factor in # of charges per year. Assuming the orange and purple curves and that user uses 10% a day… the orange curve requires 365 charges/cycles per year (9000/365=24 years. The purple curve would have 1/3 the charges/cycles per year (~122). Therefore 4500/122= 36 years. So the 10% a day user would be best cycling from 75%-45% for maximum life of battery in years.

[@templetonjp]

This is the same thought I had and makes sense to me. Unless there is something I'm missing with how "Number of DST Cycles" is being defined during this test the 75-45% options seems optimal. I plan on charging less than every single day and shooting for the 45-75% charge about 2x a week.

[@davor92k]

One cycle means one full capacity past thru the battery.. so if the battery is for example 50kwh - one cycle counts only after 50kwh have past thru the battery. So 1 cycle is not same as 1 partial charge.. So if you have 50kwh battery and you charge it with 5kwh (+10%soc) every day- that 5kwh is only 0.1 cycle so thats where you got it wrong.. I read the whole study and they explain it like that in the article.. too bad that this guy on video didnt explained that

[@jensn6490]

@@davor92k he describes it in the video description but half the people in the comments don’t understand it lol

[@neygercey7899]

I agree with you.

[@christopherhansen9037]

Is Any one of you in here with a NCM battery? And can tell the best way to charge it? I consider get the long range and it comes with NCM battery.

[@davidthomas4489]

This makes EXCELLENT sense. I am retired and unless I am traveling a great distance, I have been charging to 80% but only go to the GYM on Tuesday, Thursday, and Saturday, (20 miles round trip) and don't go anywhere else on the other days. I use about 10%. So, If I charge to 70% or even 65% I am good to go! Thanks!!!

[@jeremystone5596]

I found the Cast studies more useful Case 1: 75-65% SoC offers longest cycle life but delivers only 90,000 energy units (EU). Utilizes 10% of battery. Case 2: 75-25% SoC has 3,000 cycles (to 90% capacity) and delivers 150,000 EU. Utilizes 50% of battery. (EV battery, new.) Case 3: 85-25% SoC has 2,000 cycles. Delivers 120,000 EU. Uses 60% of battery. Case 4: 100-25% SoC; long runtime with 75% use of battery. Has short life. (Mobile phone, drone, etc.) so to get maximum total output (energy units) out of the battery by charging 75%-25% you'll get >50% more out of your battery than 75% to 65%.

[@EdLudke]

^This! By focusing on EUs you get much more of an apples to apples comparison. Best comment by far. Thanks for taking this _excellent_ video all the way to a clearly defined best practice.

[@robertkooiman27]

Nice chart! I think you should use miles or km driven as a measure of battery life. 75% - 65% charging: 10% of capacity x 500 km x 8000 cycles = 400.000 km to reach 90% remaining capacity 75% - 45% charging: 30% of capacity x 500 km x 5000 cycles = 750.000 km to reach 90% remaining capacity 75% - 25% charging: 50% of capacity x 500 km x 3000 cycles = 750.000 km to reach 90% remaining capacity 100% - 25% charging: 75% of capacity x 500 km x 1000 cycles = 375.000 km to reach 90% remaining capacity 85% - 25% charging: 50% of capacity x 500 km x 2000 cycles = 500.000 km to reach 90% remaining capacity Clear winner here is 75-45% and 75%-25%, 75%-65% is almost is bad as 100% to 25%

[@capitaner]

Good point.

[@whatwherethere]

Thanks for doing the math.

[@benoitbureau3732]

I might be wrong but I dont think you concider the fact that 1 DST cycle consider a full 0-100% charge so in the case of 65-75% you could fit 10 charges in 1 DST cycle and 1DST cycle would mean 500km in your exemple

[@robertkooiman27]

@@benoitbureau3732 Seems like the graph used states amount of cycles that you get with different options. So what you mention is already integrated in the graph.

[@DavidgGerstel]

agreed

[@anytopfive]

Please do video for LFP battery

[@profdraper]

Exactly, this assumes one size fits all and eg, ALL BYDs are LFP as are the shorter range Teslas, MGs, Mach-Es etc. Plenty of other resources on this topic tho’, eg: kzbin.info/www/bejne/rWLdfJl_hrqEY9U

[@dennisdunbar2340]

I agree with you, it's better to try and keep your battery near 50%. I'm sure everyone would agree if you are using 20% of your battery each day and add that 20% each day before the next day, it's better to do 40->60% than 80->100% or even 70->90%. The first year of charging my 2022 M3LR I always plugged in and set it to 90%. For the past year I've tried to keep it near 50%. What I saw in the first year was it started with an estimated range of 573km and after one year it was 537km. Now it is estimated at 555km. 18km loss after 35K km is really good. I'm starting a new job that will have about 20% commute so I'm going to be charging to 65%.

[@davebarnes4957]

Excellent video. Educational and short. We charge 80-30%, twice a month. So, for us, 1000 cycles is 25+ years.

[@edwardnack]

The Same

[@martik778]

@@edwardnack 2x/mo = 41.6 years! Once a week for us so 1000 cycles = 20 years

[@Fr.Spicer]

One of the problems I see with this study is that they are using rather small "1500mAh pouch packs are used in mobile phones." EV batteries are designed different both in chemistry and in the assembled array with modules in boty series and parallel. This setup, I believe could be statistilcy different. Secondly, unlike phone batteries, most newer EV's have battery management systems which never allow you to charge to 100% even if this is what your car is telling you. This is a buffer on both the bottom and top end. Additonally they "balance" the individual cell when slow charged to 100%. I do think you are on the right track, but I'm concerned that your assertions may be over stated. Ultimatly I would hope the Batteriy Universiy would do some experiments that are more reflective of EV batteries.

[@Breakdancingsquirrel]

yeah i think most cars will be scrapped 20 years in anyway and bms are very conservative now so im pretty sure you could just do the worst you can and still have decent battery during the usefull life of the car!

[@StephenButlerOne]

The only cars that last 15-20 years are cheap cars. That's because at 11 years old they are worth close to 500 quid and kids buy them as first cars. The trouble is will EV ever become first time buyer cheap, like a Peugeot 106 for a ford Ka. I don't think they will. I can see OEM starting subscription services to cars, and self driven cars. They won't want us to own cars, they will want us to subscribe to car services.

[@stevenhenderson2683]

This is the most informative video on charging my Tesla in the three years that I’ve owned it. Kudos.

[@chrisnewman7281]

I charge to 90% only because I realise that I’m using the car as a battery as a Energy store to trap surplus energy from our Solar rooftop system. On the other hand. We are not planning to hold into our current EV for any longer than two years at most. Bearing in mind that all batteries have got a reserve even if you charge to 100% there’s a further at least 10% so 90% probably closer to 80% of the actual capacity of the battery.

[@evfusion4094]

Excellent video - thanks. I am changing my charging habits as a consequence - I have nothing to lose.

[@bjcace12]

Love how you cut right to the chase and breakdown all this technical info into something I can understand!!

[@RionPhotography]

Since I got my Tesla and my home charger I’ve been charging to 75% which puts me right around 50% when I get home at night. Charging starts a couple hours before I leave in the morning so it doesn’t even sit still 75% for more than 5 minutes. My battery health has been steadily improving (it was very good to begin with on a low mileage car) and my expected range has increased about 5 miles in less than the first month. Definitely the way to go to spend as much time around 50% as you can.

[@Tooradj]

I doubt your Li-Ion battery health could improve. If you see your range increase, it is probably because your driving habits is different than previous owner. However my charging and driving practice is similar to yours to maximize the time it sits around 50% SOC.

[@bmiles1232]

Charging in the morning just before departing is good advice. We all want max range when we depart for "just in case". Your procedure gets max range at departure while spending most of the day at a lower more optimum charge state. I dropped my normal charge setting to 60% when I saw this Video. When i saw this video a second time and read your comments I moved my start charge time to 5:00 am.

[@balrajvishnu]

Awesome info mark. Someone pointed this in your previous video which I am going to restate here. If I pick a point between 75-45% that gives me about 100 miles in range. I typically drive 15 to 20 miles per day. This turn out I need to charge once every 4 days which gives me 4500 cycles and 50 years of battery life.

[@Breakdancingsquirrel]

so its pretty much saving the battery for the next user at that point right? i mean who keeps their car more than 10 years (especially when bought new) nowadays?

[@balrajvishnu]

You get a better resale value if you end up selling the car after 10 years.

[@rocketrollsvlogs7625]

@@Breakdancingsquirrel that's my take on all of this

[@trixiepickle8779]

Thanks for this Mark, I'm a new EV owner - although have had an e-bike for years. Very useful and understandable information.

[@PeterPanQuails]

The wider the gap between charge and discharge levels means less often the charge between days. So instead of daily, it may be charging every 3 or 4 days. That effectively triple or quadruple the baterry life.

[@johnafotheringham4266]

Thanks for this. I’m currently trying to run my car on solar captured via battery. For this to work I have to charge the car little and often, as the battery and solar can’t do much more than fill 10% of the car battery. I had worried that doing more frequent, smaller charges might be a bad idea - before getting the solar battery I’d have waited until I needed to add 30% - but this video suggests I’m actually doing the best for the battery. I used to max out at 80%, but recently decided to lower this figure. When charging from solar+battery I max out at 3kW as opposed to the 7kW when charging from the mains. It seems to me that solar+battery charging the car turns out to be win-win-win in terms of depth of charge, rate of charge and cost Thanks for the peace of mind

[@MarksElectricLife]

Thanks for the positive feedback John. I'm glad this information helped to put your mind at rest. I'm in a similar situation to yours however I'm guessing my solar PV system may be a bit bigger. It maxes out at 7kW, which means I can take my SOC from 40%-60% over a few hours on a sunny day. I only use about 7% per day so I can get by with plugging in every third day. I recently installed a smart wall charger (Zappi) and it controls the energy flow so that only solar igets used to charge my car. It's a great investment and I am planning to make a video about it soon...

[@BrianAnderson-ge1oo]

That was amazing. I was impressed at the depth of information about the battery life, to achieve the maximum life out the battery. But up here in Scotland. Things are very different, with the average temp about 10-15 C. So my assumption is, you can lower your expectations about about 10-15%

[@doublehelix3952]

This is v-e-r-y helpful -- my commute (four days a week) is right a thirteen miles round-trip, so I wouldn't really have to recharge more than every five days or even weekly (but maybe the occasional weekend road trip), but as another commenter posted, the battery will more than likely out-live me

[@shaunwalsh6354]

Useful information Mark, one of my worries with possibly considering but a second hand EV in the future would be how the previous owner has looked after the battery as regards charging. I know here in the UK many EVs are purchased on a 2-3 year lease or PCP agreement and I know owners that charge to 100% every night and say it dose not matter to them, because in 2 or 3 years time they will just change it for a new EV anyway, so it won’t affect them.

[@MarksElectricLife]

Fare point Shaun. There are some devices that can check battery health and I expect they will become very popular in a few years time when many people will be wanting to purchase second hand EVs. One thing you can do when going to inspect one is ask the owner to make sure it is charged to 100% when you arrive. You can compare the range reported on the display with the range specified in the manufacturer's manual for that model. This will give you a rough idea of how degraded the battery is. I will likely be selling my car long before the battery becomes an issue but it will be nice to be able to show the prospective purchaser that it still has most of its original capacity. It should mean a better sale price also (in a just world).

[@lenimbery7038]

I don't know about every manufacturer, but I think Tesla recommends occasionally charging from 100-near zero which allows the system to recalibrate in order to report more accurate expected range. @@MarksElectricLife

[@ConThomas-d1r]

Is there a chance that the car software keeps a record of the charge cycles,it's clocking distance travelled?

[@peter-d9f3l]

The problem with that chart is that it's based on the number of cycles, not the usable energy. Let's use your example of the average driver using 10% of the battery life in a daily drive. The "best" approach if you just look at that table would be to start each day at 75% and recharge that 10% each night, because that gives roughly 2x - 2.5x the number of cycles that the next line (75-45) does. But the 75-45 line gives you three times as much useful power each cycle, so you could charge your car every third day and get a longer life of your battery by using less cycles in the same chronological time. Crunching the numbers just based on where the lines cross 90%, it seems the best way to use an EV is the 75-25 approach, which gives roughly 1,500 times the battery capacity of usable energy (if you're using 10% per day, then you'll be charging once every five days). Next best is 75-45 (1,350x), then 85-25 (1,200x), then 75-65 (1,000x). All the 100% charging approaches seem to be around 750 times the battery capacity of usable energy.

[@CosminRotaru]

A charge cycle is considered to be from 0 to 100. Or the total capacity of the battery. 10 charging sessions off 10% is one full "charge cycle".

[@timdodge7536]

Exactly the info I was looking for. Thank you!

[@renaulttraficconversion]

Thanks for this video. This is excellent information. I have followed a daily charge regime for my Lead Acid batteries for over 40 years. My present vehicle is 10 years old and still has the same battery.

[@renaulttraficconversion]

I charge at 2 Amps from about 18.00 hrs to 10.00 hrs. the next day. Once a week I charge to 100%. I have bought very few batteries in the last 62 years.

[@stajgeer]

Good idea is not tell how much percentage of battery one should charge. Good idea is to educate people like you are doing impact of charging a battery vs battery life.

[@yehiaamr5965]

The important thing is miles you get before reaching 90%. So you should multiply the % usage per cycle times the number of cycles. 85-25% will give you 1200 full charge equivalents x 300 miles= 360k miles. 100% gives 750 cycles in all cases good for 225 k miles. 75-25 gives 1500 cycles good for 450 k miles. So the manufacturer recommendation of 85-25% giving 360 k miles is great. If our target is changed to 15% battery degradation then the above ranges can be doubled on average. Thanks for the data, but it needs to be re-interpreted as above.

[@MarksElectricLife]

A few people have pointed out that you can charge less often (maybe weekly) and use more of the battery capacity (say 85% down to 25%). They suggest this would give you the same outcome as charging more often and using less stored energy. This is technically correct however the reason I made this video is because that is not what the manufacturers tell you to do. Tesla, for example, tell you in their literature that you should plug in every time you are not driving the car and let it fully charge. So if you only use 10% of the battery each day and then recharge each night your battery level would bounce between 75% and 85%. This is a long way from the ideal SOC of 50%. What's more your battery is going to spend many hours standing at the 85% level. This video is aimed at EV drivers who only use a small portion of their battery's capacity each day (

[@JY-lg6ee]

I think you quoted Tesla's instruction incorrectly. Read the Tesla instruction carefully. Tesla said plug in your EV as much as you can when you are not driving it.. ***Tesla Said Plug in, Tesla did not said CHARGING **** , I text and ask Tesla many times with different customer services Rep, and validate that is that it meant. The reasons is very simple, plug it in so Tesla will use outside source to keep the battery at healthy temperature as well as BMS will use outside electricity to run it. For example, when I go home, and my battery has 56% left but I only need 10% the next day, I will still plug it in and slide the charge level on 50% , so there will no charging but home electricity is available for the car , So you are very wrong and misleading lost of people here

[@MarksElectricLife]

@@JY-lg6ee I’m not “misleading” anyone, just sharing the science. The problem is, without understanding the science, many people will just leave their maximum charge level at 85%-90% and plug their car in every day. This results in the battery sitting at high SOC most of the time. If they do as you do and reduce their maximum level to 50% that would be fine. This science explains why that is good practice.

[@JY-lg6ee]

@@jacobheinz8236 Sorry to said, you are very confused , please do more reading, by the way is your Battery LFP or NCA ??

[@iggyfan66]

Great info Mark! The idea of having a battery that lasts 5 years vs 20 years just buy changing your habit of charging is amazing. Also Love the T shirt! One of the greatest albums of all time. Cheers

[@MarksElectricLife]

Thanks Dan !

[@imankianfar6658]

Oh by the way, I should thank you for your valuable information, and I really learned a lot, I just felt like sharing what I calculated, thanks again

[@johnbb99]

I respect the work you put into researching this issue and making a serious attempt to find answers. As someone else pointed out the batteries used appear to be a different form factor and possibly chemistry to those used in most evs. Also was 20 degrees Celsius the ambient temperature or were the batteries actively maintained at that temperature? Just about every current EV actively manages the temperature of the battery pack. Next difference is what if any BMS was overseeing the battery charging process and protection? Was any cell balancing required or done? This may not have been necessary with the batteries employed in the lab tests, but It is essential that this is done with the multiple cell batteries in evs to maintain the best capacity possible. I have it on good authority (from BMW) that (in the case of the i3 at least) cell balancing only occurs at 85 to 100% state of charge. For that reason I shall continue to leave my car on AC charge when the battery is full, so that the BMS may do cell balancing and then shut down the charging process automatically. Which it does. This topic is certainly shrouded in mystery and it's very difficult to find authoritative advice on how best to treat your battery. I am concerned that lab tests done on atypical batteries, may not provide us with the answers we need. But thank you for trying.

[@neygercey7899]

Well, I’m one the low km/day kind of drivers, maybe 10km/day in average. So, it’s about 100km/week max. That’s 1/3 of my battery range and if I keep battery between 45-75% it means one recharging/week and, according to your chart, my battery would be 90% CR after 4500 cycles, or 4500 weeks, or nearly 86 years. That’s quite good battery life😊

[@journey-Mein]

Thank you once again. I find both videos relatively concise and to the point. Your premise isn't mere conjecture and is supported by actual data. Assuming a tesla Y LR has this type of battery architecture you have provided a great service to me and my vehicle in this sea of reported proper procedures. i Wish they carried that chart down to a 60% Max SOC. I don't know if I have the nerve to drop my SOC to 70 0r less but i did take a leap and drop it to 75 for its first night. Gives more room if i find a free charger too . I was pondering something. it probably pertains to any vehicle. When i read the data i apply it to the charge scale indicated in the cars charge window. However many manufacturers and articles indicate that that number doesn't necessarily equate to the actual batteries true SOC %. I cant recall real world examples but for illustration. Manufacturer F may be conservative and when the cars scale reads its at 100% , it may actually only be at 80 in their attempt to protect the battery or improve longevity. if this were the case there may be a fudge factor for us paranoid drives. The end benefit doesn't change though were we are on the scale may. Being from New England US I can't help but admire the dialect , i don't smile for anything lately and admit i smirked at "ducks and guts" . Belated as this may be I thank you sir.

[@davidnicholson6901]

Once again, Mark (referring to my comment on your first 16minute contribution) your video is very helpful. in my case I ave a varying mix of local trips with the occasional longer ones being around 50 - 60 km return. Outside these longer ones I can follow your recommendation. I usual simply top up (at the times of max solar cell production). Certainly more complicated that the petrol filling stations!

[@tobytaylor1454]

Very common sense mate👍🏻👍🏻I very seldom drive me petrol car and the maintenance cost are high for the small amount of me driving 🤷🏻‍♂️I fancy a EV for the very minimal maintenance and I think I’m a oldie and blimey!!! That E car would outlast me😂Thanks for the help in me research on these buggers gooday to ya mate👍🏻👍🏻👍🏻

[@WokACT]

Great info mate, will be very useful in the near future (hopefully)!

[@MarksElectricLife]

Thanks Warwick! You just got a new sub 😀

[@howardsommerfield1189]

I looked at the data provided (Chart @ 3:00 min) and come to different conclusions. First longer life is not the number of charges from the battery, but (in the case of a car) the miles / kilometers driven. In my analysis of the provided data, I added an assumption of a car with 250 mile max range (400 km) and converted the % of charge to miles driven: 100-25 = 187K | 100-40 = 180K | 100-50 = 187K | 85-25 = 300K | 75-25 = 375K | 75-45 = 337 | 75-65 = 217K. Clearly charging to 100% and very frequent charging shortens the used capacity (the ultimate goal) of the battery, and fully using the middle 50% of the capacity of the battery yields the most useful life (375K miles) from the battery. It would also be interesting to see a test that also compared the difference between fast charging and trickle (overnight in a car) charging. It is already known that trickle charging is better for the battery, but by how much? Also, this demonstrates that a larger battery will not only provide more range in a vehicle, but last longer, as well as have a better useful range when the capacity drops below the 90% or even 80% capacity.

[@Tooradj]

The critical question is what the x axis (Cycle) mean in this chart. If 1 cycle for each of these lines mean going from stated Low SOC to high SOS and back once, the chart is useless. The mileage value of all of them is basically the same and no matter which practice you chose you get the same number of miles out of your battery. However if a Cycle means equivalent 0-100 percent, then the OP’s conclusions stand. That is if 65%-75% is done 5 times of 50%-100% to be at the same place on X axis.

[@jensn6490]

@@Tooradja cycle is fully charged to empty or vice versa. It takes ten charge sessions from 65% to 75% to equal one cycle.

[@martik778]

Had a Chevy Volt for 4 years charged 25-100% almost daily (80km range) but the battery had the same capacity after those 4 years. I think there was a bulit in buffer of 20% on either side though. 1000 cycles would be 20 years on our current ioniq5 (20-80% charge once/wk) so I guess it's battery will last more than our lifetime!

[@jozef5373]

I follow your advice for few weeks/months from your first video (65-75%). Now my Citroen EC4 has SoH 100,56% after 9 months and 11000 km. Before this pattern I tried to charge max 80%, usually around 60% only. Similar mileage EC4s and age has 95-97% SoH with same obd device and app (based on our forum). Maybe Im just lucky or it really works.

[@GarryBBimmy]

Great information, I'm thinking of buying an electric car as my mileage has reduced to around 10 miles a day with the odd day around 150 Cheers Garry B in Manchester UK

[@cabforwardooo9983]

Tesla suggests leaving the car plugged in when parked at home, limiting it to about 80%. This supports the idea of not waiting for the level to drop way down before recharging. I currently limit charging to 75% and plug in when it drops to around 50%. This video confirms to me that I'm doing it correctly!

[@Steve_in_NJ]

I just took delivery of a KIA Niro EV. It's a 11kw charging port for a 64 kw battery pack (range of 253 miles). The dealer charged the vehicle to 100%. I do not drive long distances (I'm retired, so no daily commute). I average about 10 miles a day! My last vehicle, after almost 3 years, only had 9200 miles (also there was the Pandemic, where nobody drove for weeks). I am planning on charging about twice a month under normal circumstances. My home charger won't be installed for another few weeks (local permits needed), so I should be fine. Everyone else says to charge up to 80% but you're saying 60%. Either way, one charge should last 2 weeks unless I take a short road trip. Thanks for your informative video.

[@marchcyr1811]

I'm also retired and looking at the graph at 5:54 I should get 1000 charges for 90% battery degradation. So if I charge once a week, that's around 20 years of life. I live in the Montéal region so rust will kill the car before the battery dies LOL. My car is a 2022 40 kW Nissan leaf, so let's say 200 km ( 120 miles for the old system users) for a total run of 200000 km or 120000 miles. To me, being an old Dodge boy and Mopar head, it dont seem so bad, sort of like driving my Kcars into the ground when I was a student. Peace be with you!

[@ziploc2000]

I want to specifically thank you for this video, and the related longer one, regarding charging. It has changed the way I will be charging my Bolt EV. I had planned on one or two charges a week, thinking a "cycle" was a plug in and charge, regardless of the charge level of the battery. Instead I've learned to keep the battery in that 45-55%, or 40-60% charge, as much as possible, for battery longevity. We will be using our EV for the daily commute, maybe 30 miles a day with sidetrips, and plugging in nightly at a slow trickle using the level 1 charger provided will easily keep the battery topped to that level. My remaining question is, is Level 2 more efficient in overall power usage? We could install a lavel 2 if we wanted, and if it saves money over the long run might be worth doing.

[@pilgrimcare3619]

... yes BUT if you charge only 10-20% each time you may be doing that every day as opposed to every few days so the number (rate of cycling increases) if the graphs were redrawn adjusting for an increased rate of cycling over time then I suspect the lines would be much closer.

[@sudhi5534]

Absolutely! I may be charging many more times to get the same range, which makes this entire video meaningless without considering your point.

[@bcduckworth]

Agree. The conclusions don’t factor this in, and are therefore incorrect in terms of battery life.

[@peteglass3496]

Indeed, 2000 cycles of 10% discharge are equivalent to 1000 cycles of 20% and the graphs need to be reconstructed to compare like with like.

[@stephenrussell6074]

There is little information about going from say 100% to 65% it is possible the degradation only occurs with a greater depth of discharge. So we can know nothing of that for overnight charging as the 80% figure is quoted mainly for fast charging as the charge slows down a lot between 80-100. In any case all of these need to be recalculated on the basis of 100-0 cycles worth of energy The 85 to 25 gives 60% of capacity so its 2000 cycles would be 6x that of the 75 to 65 so its cross over for distance travelled would be the equivalent of 12000 cycles at the 75-65 level so in terms of usability the 85-25 with a charge once every 6 days would take you a lot further than 75-65 charged everyday, assuming that the journey is 10% of battery in total. In any case for a car with a real world range of say 200 miles 60% would give you 120 miles 2000 cycles would be 240000 miles. The 75-25 is 50% so 100 miles range 3000 cycles 300000 miles, 75-45 30% 60 miles 5000 cycles for 300000, 75-65 20 miles 9000 cycles for 180000. In all cases the car is still going with 90% battery excluding any buffer between Gross and Net battery available, in many cases 10%. All of these are doing many more miles than a typical vehicle in its lifetime. I can also be certain that an 8 year old ICE car will be around 10% or more less efficient at 8 years old.

[@radiotowers1159]

Nice video and very informative if you only take the battery life and of course the money it will save you over the life of the car IF you intend to keep it for a while. However , certainly here in the UK the electricity cost can vary as we now have time of day pricing , where at times the cost per unit of electricity can go down to 2 or 3 pence per unit and even at times negative pricing for a few hours where you get paid to use surplus energy. This is compared to a specific EV tariff at around 9 pence per KWh. At times with the negative pricing the sensible way forward is charge to 100% to take advantage of Free travel costs and money credited to your energy account. This …may….. offset the degradation of the battery life, and complicate calculations.

[@richardhobbs7107]

I would say, 'At times with the negative pricing the sensible way forward is charge to 75% max.' Why? 'cause your not gonna use all that extra 'free' energy in your short commute, but charging the battery to 100% is gonna harm it over time. SO , keep your bat in the +/- 50% range by charging only in the 'free' and low cost times when you can. IF you know your next day will require more, then you charge above your 'norm'. take care, rh

[@TheEzReiter]

Interesting Video. So I think we can all agree that charging a battery to a 100% (all the time) is a "fools errand". For the occasional long trip from the start is okay. Holding battery to a max of 80 / 75 would be good practice. I think what we are seeing here in this chart that is more important is the Depth of Discharge. The best case scenario is only drawing the battery down 10% then recharging. I would think that 80% to 70% would yield similar results. The issue revolves around the recharging. As the battery fills the charging current has to ramp up to force more power in the battery to get it closer to 100% and more power means more heat and as these batteries are a bunch of chemicals this heat damages the individual chemical molecules thus reducing overall capacity over time. So keeping the battery temp down will help to extend the batteries life. Only charging up 10% each time will reduce the amount of time the battery has to generate and hold heat. I have an Ionic 5N and yes it is a Joy to Drive. As a first time owner I have done years of research before purchasing. I have a 24 mile round trip (Home-Work-Home) and I recharge every night using level 1 charging "115VAC @ 15Amps" (i am the States) to regain what I used that day. Level 1 basically being a "trickle charge". I use and OBDII and Car Scanner to monitor my SoC and Temps and this keeps everything nice and cozy. Long trips I charge on level 1 to 100% then use DC Fast Charging to 80% the least number of times to get to my destination. While always engaging the battery conditioning after a DC Fast Charge to bring the battery temps back down. Usually 15 to 20 mins after leaving the charger. Based on your presentation, only using 10% and recharging everyday would yield a theoretical battery life of just over 23 years (8500 / 365). With a final toll of only 10% loss of full SoC. As Tesla owners have the most documentation on battery longevity some have reported only seeing 5 - 8% degradation after 10-15 years of ownership. (These are people who know the technology they are using) I have had many an interesting and enlightening conversation with new EV owners at Fast Charging Stations. Seriously folks Read your owners manual and do more research. I feel A LOT of EV owners didn't know how to check engine oil in their ICE vehicles.

[@ed-th6ev]

You need to take into account the fact that 1000 cycles from 100 to 25 means 75000kw, while from 75 to 65 mean 10000kw (hypothetical 100kw battery). I want to see the same graph normalized for total energy consumption

[@ed-th6ev]

75000 kw consumption using 100 to 25 range, means 1000 cycles, means 90% capacity remaining. 75000 kw consumption using 75 to 65 range, means 7500 cycles, means 92% capacity remaining. So 2% remaining capacity difference between the so called "best" charging method and the "worst". If you don't explain this to people I consider your video plain misinformation.

[@sveinmedhus4156]

Totally agree. It is NOT about how many cycles you get, it is about how many kWh you can get out of your battery until the battery is worn out.

[@williammacey9502]

Exactly, recalculate the figures and fix your video

[@CosminRotaru]

@@ed-th6evA charge cycle is considered to be from 0 to 100. Or the total capacity of the battery. 10 charging sessions off 10% is one full "charge cycle".

[@ahmedlasfar3290]

Excellent video. Very informative, thank you very much. But is this chart good for LFP battery also?

[@scotttitensor8557]

Please explain best practice for LFP battery. Tesla says to charge to 100% at least once a week. What say you? Especially for low use customers that use roughly 30% to 40% battery capacity each week.

[@jimusa9330]

I drive the 2024 CyberTruck that has the 4680 battery pack. I believe these batteries have the new NMC 955 chemistry. When I took delivery, the Tesla rep said I should charge to 100% once a week. This doesn’t make sense and I won’t follow this advice until I get additional information back up Tesla’s recommendation.

[@tolgasobac8850]

Many thanks. Very useful information...

[@MarksElectricLife]

You’re welcome!

[@kelalamusic9258]

Very helpful information. I have a 2022 Nissan Leaf. I’ve had it for about 2 1/2 years and have only driven about 2500 miles. Obviously we don’t use it that much as it’s for around town use only. I plan on keeping it for as long as possible. So, hopefully following what you say should extend the years of use. Much thanks.

[@MarksElectricLife]

You’re welcome. Thanks for the positive comment.

[@stevezodiac491]

sadly, even if you don't use it much the battery will still degrade. lithium ion batteries degrade with use cycles but unlike ice cars degrade with time as well. The battery will degrade just sat there. My leaf started showing battery bar loss at 5 years old. it is now 8 years old and only 40k miles driven and has lost 4 bars and 33% capacity, even though it has been well looked after. My advice to you is to sell it before the battery bars start to disappear, because when they do, nobody will buy it like mine and you will be stuck with a short range local shopping trolley tied to your home charger range, with no option to do long journeys, as mine is, until it is scrapped, when it is not economically viable to change the battery on what is otherwise a good car.

[@JJN603]

this is one of the greatest videos on this topic thanks

[@SmartMart1658]

New research has shown that supercharging your Tesla is not as harmful to the battery as was first thought. Also some new battery chemistries will last longer if you do charge them every time to 100%. Note that for lithium iron phosphate (LFP) batteries, it is OK to charge to 100% every day since the chemistry is more resistant to degradation.

[@SPX3455]

Charge with Level 1 charge between 45 and 55% every day.

[@tolrem]

Interesting info thanks.Will suit me fine with my small daily mileage.

[@derekness7900]

I have two EV s in the family and I charge to 100% mainly at 2.3Kw. I don’t buy this charge to 90% business. Back in the 70s I used to design batteries for emergency lighting which were on continual trickle charge , so I get this . The battery systems of today in cars have very good control systems so they will not allow an overcharge situation that could give the issues that have been mentioned. This is not a problem so all of you that charge to 100% can sleep safe in your beds your EV will be just fine - believe me I am an (ex) battery development scientist!

[@pauld3327]

Bad advice.

[@Dzaen2]

got any documents that supports anything you said?

[@JohanLofgren-jc4mh]

Maybe this advice is good for some batteries, but not every batteries on the market. Follow the manufactorers advice.

[@pcw0652]

I like where you're headed with your analysis on this topic but I think you've stopped short of the desired conclusion. What I think most people will be interested in is how many days or total kms you will get out pf a battery given the 90% threshold and the different charging regimes. If you take an average car energy consumption of 20kWh/100km (and many cars may actually use a bit less that that) then you will use 40/100 x 20 = 8kWh per day. If you then calculate the total kWh you will get out of the different charging regimes and divide by the 8kWh you will get the number of daily trips. My calculations are based on my car with 80kWh (usable) battery which gives me the following: For the 100%-25% charging regime, reading from the graph we get 1,000 cycles. We are consuming 75% of 80kWh or 60kWh per cycle. Dividing by the 8kWh gives 7.5 trips before we have to recharge. Call it 7 (1 week) to make the arithmetic easier and more realistic for when you would recharge. If our battery only lasts for the 1,000 cycles, that means 7 x 1,000 x 40kms = 280,000kms and 7,000 days or 1,000 weeks which is over 19 years. Similarly, reading data from the graph and extrapolating as necessary, the other regimes give the following: 100%-40% 288,000kms and 7,200 days (nearly 20 years) 85%-25% 504,000kms and 12,600 days (34 years) 100%-50% 300,000 kms and 7,500 days (20 years) 75%-25% 600,000 kms and 15,000 days (41 years!) 75%-45% 576,000 kms and 14,400 days (39 years) 75%-65% 360,000 kms and 9,000 days (24 years) Clearly, avoiding the 100% charge is the key, and the stand-out winner is the 75% to 25% regime. Personally, I am doing mine with a 60% to 20% regime with the occassional 85% or 90% if I have a long trip.

[@hrpzwift945]

What is a DST cycle - For the Green line 85-25% the 90% capacity is reached at 2000 cycles and for the Magenta line 75-45% the 90% capacity is reached at 5000 cycles. The Magenta line seems to be a good choice from that perspective. But what is a DST cycle, If it means that one DST cycle is charging from 45-75% for the Magenta and if one DST cycle for the green line (25-85%), the you will need twice as many DST cycles for the 45-75% charge compared to the 25-85% charge - which then does decrease the difference of the number for cycles from 3000 to only 1000 cycle. Basically what is a DST cycle is it every charge regardless of how much you charge - is a 45-75% and a 25-85% charge, both considered at DST Cycle ??

[@JJN603]

if you can do another video on this stuff more in depth with more studies with like disrcharging to 10% and stuff like that.would be amazing

[@Emcee_Squared]

How about a follow up to this video with all the latest updates? Are there any dst charts which show 40-60% ?

[@satyan2428]

@Mark - Thank you. Really appreciate the clarity and depth of understanding. One question that pops up for me is "What about this whole thing concerning "Cell Balancing"" which is what some EV manfacturers advise as the reason to charge to 100% - How important is that ? Do batteries degrade faster when they are out of balance during the 40% to 60% charge ?

[@MarksElectricLife]

Hi Satya, two points. Your cells are less likely to become unbalanced if they are well "cared for" by avoiding fast charging and by not leaving them to stand at a high or low SOC. Most people will occassionally go on a vacation or road trip and need to charge to a high level (>85%). This occassional overcharging should be sufficient to rebalance the cells.

[@satyan2428]

@@MarksElectricLife that's wonderful Mark! Thank you. Your video has been very helpful.

[@MarksElectricLife]

@@satyan2428 You're welcome !

[@slonWDFPF]

Seems like the best way to charge is 25-85% as said by the vendor. Because you will need to recharge the battery rarely, it means that you dramatically decrease the number of recharge cycles. For 65-75% you will actually need to charge each day...

[@MarksElectricLife]

That would be true but only if you ignore the manufacturer's instruction to plug in every night. Tesla advise to do that in all their literature. If you only use 10% each day and plug in every night you will be bouncing between 75% and 85%, which is not ideal for longevity.

[@obieWanmotivation]

Hence why I agree with your opening point (Tesla owners, don’t come for me) that your daily average mile should dictate the top SOC as opposed to the recommended “1 size fits all 80 to 20”. In a nutshell, if you’re driving 20 to 30 miles per day, you can potentially lengthen your battery life by reducing the top SOC after charging to no higher than 75% until you have a longer than normal mileage day. It makes sense.

[@stevengiannakopoulos326]

9000 cycles of 10% (75-65) are equal to to only 1500 cycles of 60% (85-25) so it’s about the same battery retention in the end. Sorry to rain on your parade.

[@caleb7475]

Think that purple line is the one to aim for.

[@ronedwards8239]

What many don’t understand is if you charge for example to 60 or 80% that is not a full charge cycle. I sold my electric scooter to a guy who works for Lucid Motors. He drove a Tesla. He also told me to charge to 60%. My plan is to charge to 60% during the week and 80% on weekends as my trips are longer range.

[@MarksElectricLife]

Hi Ron, that may be an area of conjecture but the scientists who conducted this research define a cycle as one charge period where the SOC is increased from the target minimum to the target maximum for each data set. For example, in the case of the green line a "cycle" is one recharge, taking the SOC from 25% to 85%. For the orange line it is charging from 65% to 75% SOC.

[@mdmattingly1]

​@@MarksElectricLifeIt seems like the fact that the car would need to be charged 6 times as often should be considered. Someone who only uses 10% a day isn't going to be charging from 25% to 85% each day.

[@aneeshzutshi3419]

@@MarksElectricLife You have a completely incorrect understanding. A cycle is always counted as 100% equivalent. 70% to 50% is only counted as .2, so one cycle is 5 times movement of 70% to 50%. Cycle is defined the same across all experiments otherwise the experiment would make no sense.

[@MarksElectricLife]

@@aneeshzutshi3419 "always"?? Respectfully, you are making assertions about the testing conditions without having read the paper or asked it's authors for clarification of the test conditions. If you read the paper you will find that the authors differentiate between "Full Cycles", what you are referring to, and Dynamic Stress Testing (DST) cycles, which are short cycles between a nominal minimum SOC and maximum SOC (e.g. 50% to 70%). For the chart being discussed in this video they are recording DST cycles, not Full Cycles.

[@springhillfitness6837]

​@@MarksElectricLifehi, I enjoyed the video and think you give good advice. However the difference may not be as large as the chart suggests due to the way a charge cycle is defined. For example if we assume a range of 300km, the 85-25% test yields 2,000 cycles or 360,000km while the 75-45% test yields 5,000 cycles or 450,000km which is certainly better, but less dramatic than the chart suggests.

[@davidjohnson7633]

This is great information, thank you for posting. But your conclusion is very flawed. For example, if one uses 10% of the battery each day and charges daily as you suggest, the battery would be good for about 9000 charging cycles before hitting the 90% capacity point, which equates to nearly 25 years. If one drives the same daily distance but charged every 3 days (45-75%], the number of cycles drops to 4500. Because the number of charging cycles per year is 1/3 of the base case, the 4500 charges are good for 37 years. Charging from 25-75% drops the lifetime charges to 3000, but now the same driver using 10% of the capacity each day would only need to charge every 5 days. Therefore the battery would last 41 years. This is much longer than your conclusion and is considerably more convenient as well.

[@u77171]

Your conclusion is highly inaccurate. Think about it .....

[@fergman300]

Really great information thanks for sharing all that research

[@imankianfar6658]

I think something is missing here, you didn’t take into account the distance travelled with each recharging cycle, with that being considered i think the one with cycling between 45%-75% will last far more than the one with cycles between 65%-75%

[@sagunkatuwal9717]

Case 1: 75-65% SoC offers longest cycle life but delivers only 90,000 energy units (EU). Utilizes 10% of battery. Case 2: 75-25% SoC has 3,000 cycles (to 90% capacity) and delivers 150,000 EU. Utilizes 50% of battery. Case 3: 85-25% SoC has 2,000 cycles. Delivers 120,000 EU. Uses 60% of battery. Case 4: 100-25% SoC; long runtime with 75% use of battery. Has short life. This is also mentioned on that site. As a consumer its the amount of kms that the battery runs before it reaches 90% or 80% of its initial condition. In such case the one with higher EU gives you more mileage before battery replacement than the one with highest cycle.

[@constantbuzz]

One way to look at it is how many Mega Watt Hours the battery will deliver before it reaches 90% of original capacity in each one of the tests. I would assume the results would be different if one test cycled is performed per day versus the tests being ran back-to back around the clock since calendar aging would have more of an effect in the former. Below are what I come up with for mega watt hours delivered based on a 2022 Model 3 LR, with a usable 80KWh battery. On this battery, 1% of SOC = 800 watt-hours, when new. The Average watt-hour value of 1% SOC between 100% and 90% of the original battery capacity is 760 wtt-hours. Amount of mega watt hours delivered when only recharging within the cycle range stated below at 20 degrees C until battery reaches 90% of original capacity: 100% to 25%, 1000 cycles = 57 MHW 100% to 40%, 1250 cycles = 57 MHW 85% to 25%, 2000 cycles = 91.2 MHW 100% to 50%, 1370 cycles = 52 MHW 75% to 25%, 2900 cycles = 110.2 MHW 75% to 45%, 5125 cycles= 116.85 MHW 75% to 65%, 8750 cycles= 66.5 MHW

[@evdave6693]

Great food for thought. Thanks!

[@rickcowan7527]

Very helpful! Thanks for documenting your conclusions so thoroughly.

[@MarksElectricLife]

You're welcome!

[@diydrivenGA]

So I keep the car between 65-90%, 90 being the recommended level for battery health (volvo). I think this is a small enough depth of charge while keeping enough on hand in case I need it or am unable to charge. The Volvo has a short range (200 miles) so I wouldn't be comfortable keeping it between 40-60 regularly. That's on me though. I'm the same way with all of my devices.

[@aeroncaflyer8474]

But you don’t seem to take into account that if I charge my battery between 80%-25% I only need to charge once a week so it will only be 52 cycles per year?

[@drevent7677]

exactly right and at 52 cycles a year 1000 charges is 19 years+

[@varunbathija]

This video made me change my mind on buying an ev. So dam complicated. If the manufacturer is giving me a warranty of 8 years or 200000km why on earth am I gonna become a scientist and make my life miserable.

[@hizlimax]

You are missing on the number of charge cycles. You will create so many more charge cycles doing 50-60 everyday compared to for example 20-80 everyweek. The more charge cycles you create the quicker your battery will die.

[@grahamf695]

If you discharge from 100-25%, then you are using 75% of the battery’s capacity. If you discharge from 75-65%, then you are using only 10% of the battery. So it’s important to understand what they mean by a DST cycle. If the mean the equivalent of 100-0%, then that gives one lifetime for the battery, but if they mean the discharge from 75-65%, then it needs 10 times as many charges to drive the same distance.

[@willwray8511]

Great info this will change how I charge

[@rp9674]

The more I learn about battery health the more I lean toward a larger battery, 300 Mi is too much though. At leave home with a little under 80%, get to work with about 50%, get home with about 30%

[@jjamespacbell]

Please correct my assumptions from the above graph. Based on my Model Y long range 300 mile range Balck data: 300 miles * delta of 75% = 225 miles times 4,500 DST cycles = 1,012,500 miles travelled Yellow data: 300 miles * delta of 10% = 30 miles times 4,500 DST cycles = 135,000 miles travelled After 7 times the distanced travelled I would expect a lower retention.

[@MarksElectricLife]

Hi James, there is indeed a lower retention. On the black line your battery will only have 78% of it's new capacity, whereas on the yellow line you can still charge up to 94%.

[@rocketrollsvlogs7625]

Maybe one day this will be me. I do about 35-40 miles a day. Charge 80 to 20% and it works for me. Don't really expect to keep this 2 yr old car for more than 3 or 4 years. At least not as my primary. The thing is if you aren't using but 10 to 50% of your range, why does it matter if it depreciates 20 to 30%.

[@mds33483]

Thanks the video was very helpful.

[@MarksElectricLife]

You're welcome!

[@lm3718]

I liked this video - the small km/day use case is often ignored. Do you plan to do similar with LFP batteries?

[@JohnnyChronic18]

So you are getting close to the same Kw used right? So same distance traveled just in shorter intervals.

[@neilhenderson5782]

Very interesting video. I was told years ago to recharge the batteries (Lithium) in my golf cart and electric drills, etc............ as soon as I had finished using them and not wait to start recharging. So far my batteries have stayed intact and are working well. When we buy an electric car we will need to manage its batteries - why doesn't the software in the charging systems ask you which curve on the chart you want to follow & then implement the users choice? Seems to be a product opportunity?

[@sgsuper1150]

I think up to 90% is ok if you discharge the battery straight away but never charge over 90% unless the cell balance is at 100%. Then you have to charge to 100% every month. Only tesla have this low state balance so it's not really practical in most evs.

[@johnreese3762]

Great info, thanks!!

[@markkennard861]

100% no matter what. Easy. Just read the instructions.

[@edwarddenmark2393]

This table shows duty cycles. If you are only charged 10% of your battery at a time that's 4 cycles as a pose to change 40% once. So the battery will has to last more cycles at 10% charge for the same number of miles traveled. From your research which cycle pattern does the battery cycle the most power. Not the most cycles.

[@stulop]

I seem to be following the blue line for the most part on an easy 250 mile range car. It would mean I'll likely be dead before the battery is below 90%.

[@scottwylde8528]

It's a very good comparison of Apples and Oranges! hehe 🤣

[@stajgeer]

I have a question not a comment. What kind of effect your battery will have if you only charge 50 percentage max and let it drop to 10 percentage. This will help most of retired people. Thanks

[@DM-zk5wu]

Great info ❤ Thanks 🎉

[@chrisnewman7281]

Wondering what’s more important the actual upper figure the batteries is charged to or the fact that there’s a lower level of discharge. I charge my battery to about 90% using AC power and generally charge it not too much past 60% so there’s working in a 30% band.

[@GeeDeeBird]

I remember watching your original video and thinking, "This is misleading." It still is. Start with the assumption that you use 5 percent of battery power per day. The yellow line (65-75) requires you to charge every other day. So the actual days of charging above 90 percent is 17000 (8500 * 2). Of you take the black line (25 - 100) you must charge every 15 days. The days of charging above 90 percent is about 15000 (1000 * 15). The optimal charge range is the pink line (45 - 75). The days of charging above 90 percent is about 30000 (5000 * 6)!! This is the closest range on the chart to the industry recommended range of 50 - 80, which means the recommended range is almost certainly better than the yellow line. The trick that to many commuters miss is that you MUST NOT charge your EV every night. Instead, run it down to about 50 percent, then charge to 75 or 80 percent. More simply, charge your car on Saturday or Sunday, then wait until Friday to charge again (or Thursday if you have plans for the weekend). Your battery will remain health for longer than the motor, suspension, or any other part of the car. Thanks for sharing.

[@bjk6574]

I have a Tesla main love it. But I know my friends and family who don’t have An EV would say forget it I’m gonna skip the gas don’t have to worry about the stuff😅

[@daisiesushitam984]

Great video! If charging time is not a concern, would charging with a level 1 charger prolong battery life vs using a level 2 charger? *Charging from 40% to 50% daily*

[@Al-YT]

Would the Tesla M3 Highlander be a Lithium battery (LFP one)? Under the study’s standards?

[@jbrocks9845]

One niggle. While it’s a universally accepted concept to minimize the SoC at

[@figueiredoeduardo7252]

Nice video! Is this valid also to LFP batteries?