Prius Hybrid Battery Nexcell Lithium Review

Here is my experience upgrading my 2012 Prius to a Nexcell Lithium battery.

[@GLC-1979]

38 mpg to 48 alone is a HUGE increase. Who wouldn't want 10 mpg better? Over a short amount of time that's an incredible savings.

[@dbroemechain2675]

Was kind of confused when he stated it like he wasn't even getting 10%, and then turns around and shows base calculations blowing that out of the water... I'm going to go out on a limb and actually expect that he was really trying to get mid 50's and not getting it. Still a win in my book. Try doing that with any other hybrid, let alone a non-hybrid.

[@ipviri]

I observed, and came to the same... 38mpg to 48mpg is 10 points, which is a 26.31% improvement!

[@brucey5585]

😂yep. I was very confused as 38 mpg to 48 mpg is not great. 10 mpg is a huge difference. I was happy when my tacoma went from 17 mpg to 19.5 mpg after a tune and differentials oil change.

[@alext8828]

@@ipviri Yeah, really. But that car should have been getting 48 all along, not 38. So the improvement is a little inconsequential from that standpoint.

[@atcclass]

​​@@ipvirithanks for calculating, I really noticed at least a 20%+ on his words, but he couldn't see it? Thanks for commenting. Thank for sharing the expense and improvement mpg, this got the mpg back to the original? But it is after the 108 k + miles you have on you Prius. Yes, it is worth that 2600 + u paid. Lower price for a DIY.

[@JADURCA]

Great! Thanks for taking you're time for such an informative video. I think a yearly update would be cool, so we have a time perspective as this lithium battery use for a Prius is something new.

[@loungelizard836]

You've reduced your weight by maybe 75 pounds, which you might notice. As you mentioned, the bad thing is that the LiFePO4 cells REQUIRE a low-temp cutoff for charging (at about 0 C or 32 F), and if there isn't one in those packs the battery will be destroyed in sub-freezing temperatures.

[@akassebaum]

When I first bought my 2007 Prius, I was told that the battery would last 8 years. Surpisingly, we had it for 14 years. I passed it down to my kids as their first cars. At that point, I didn't want to spend any more money trying to revive it. We had done some expensive HVAC repair, so I wasn't going to splurge more for a new battery. I am not mechanically inclineds, so it would probably cost an arm and a leg to get someone else to do it for me. It was a great car for the time that I owned it. RIP Prius!

[@thesmuler5627]

You should have sold it

[@natecaine7473]

I had been keeping a spreadsheet on my 2005 Prius from Aug 2022 thru Apr 2024 (until a Hit-and-Run DUI destroyed my car). One thing I noticed, and later coded for, was the mpg vs month, since here in Phoenix summers are VERY hot (Last July is was 115°F every single day!). I also kept separate columns for MPG(Prius) and MPG(calculated). Typically these were +/- 2% but occasionally as much as 5% which I attribute to different pumps clicking off when the tank might not be completely topped-off. The majority of fill up were at 2-bars (around 8-gallons). But we know the Prius gas gauge is notoriously inaccurate. One thing I noticed (and wished I'd kept better track of) is that during moderate winter months (when I use the heater) the Hybrid Battery would often charge to 7-bars. But during summer months (with heavy air conditioner use) the battery would commonly only be 3 or 4 bars (and often 1 or 2!). I think the Hybrid Battery management system takes into account the battery temperature and wants to keep the State-Of-Charge low when it's really hot. If you think about it, MPG is Miles per GALLON of *gasoline* which is mostly a constant from the ICE. i.e. long term, all the miles you drive are from *gasoline*. The efficiency come for recovering energy using regenerative braking and now wasting it using friction braking. So changing batteries or battery technology shouldn't make much difference, except.... In this case we are comparing a defective NiMH battery at end of life and with reduced capacity, compared to fresh LiFePO with full capacity. So the old battery likely has reduced regenerative braking (less storage) and is reverting to using more friction braking more often (thus reducing MPG). Similarly, the old battery has less energy stored (from previous charging or regenerative braking) so more of it's acceleration is from the ICE at a lower mpg efficiency.

[@richierichautoparts]

Heads up the battery are blowing up...just seen on Facebook

[@robertsherertz]

Have you had trouble with your ABS traction control and brake warning light coming on and no regenerative braking I've been through with this car over and over and over again this lights coming on and disabling the regen. I have a 2012 Prius model 4 pretty similar. I've had a good refurbished nickel metal hard drive in mine for about 4 years from a company called Dr Prius another one probably in Northern Virginia. I've been interested in the lithium ion option next time I have trouble with it but I can't seem to sort out what's wrong with the ABS light

[@RCREVIEWS101]

biggest problem I see is....the management software of your 2012 Prius was made to NiCd batteries and is completely different from Lithium batteries required specific software. Only the 2015 Prius and up have the management software for lithium batteries. So, in the long run, your batteries will fail early by lacking the correct software to charge and discharge limits and balancing the cells

[@loungelizard836]

The lithium pack should come with it's own internal BMS and balancing circuits, If the voltage is the same (as it should be), and lithiums have lower internal resistance than NiMH, there should be no problem.

[@DaBinChe]

Not NiCad, but NiMH, there is a big difference.

[@EspHack]

Even a badly treated LFP cell will outlast the stock garbage, same for that lead acid 12v x20

[@DaBinChe]

@@EspHack I had a 12v LFP starter battery and it couldn't take the heat of the engine compartment on a 10day road trip thru the high desert west. Battery temp was over 130*F on those triple digit days. That trip killed the LFP battery, it was less than a year old. Went back to a lead acid starter just a smaller one, 51R to 151R.

[@pr5991]

@@DaBinChethis is what I did kzbin.info/www/bejne/m56moX-lgKqAjs0si=VWWUoDip7xhdgARo neve run out juice to start the prado

[@jgawad]

You should have started the video by saying why you were doing the battery replacement. What advantage did you hope to reap

[@zakbasher]

Thanks for the video! Didn't you say that in the beginning you were getting 38mpg? now 48-50mpg?! I'm confused when you say that you "didn't get a crazy 10% increase....". What am I missing?

[@JeffKomarow]

No problem let me explain here: 38 is what my trip computer said it was getting when the battery was going bad. I don't know how accurate that was but overall my mpg was diminishing. Then the new lithium battery brought it back to 48 mpg which is the same as stock. The proposed 10% increase is over stock which would bring it up 5 mpg to about 52-53mpg. That's what I am saying that in my vehicle I didn't see a crazy increase in mpg improvement over stock, but its totally acceptable. And I want to add that literally YMMV, this is just the story of my car and driving habits which on an individual basis concluded with these numbers, there could be another component holding back the improvement in MPG which is only on my car that has over 100k miles so things could be different for your car.

[@zakbasher]

Thanks for the explanation. I had a 2013 Prius V that was getting about 34mpg. It was the 3rd V that I had a lot of experience with but the other 2 were newer- 2016 and 2017- (gen 4 engines) and they got around 44mpg. I put a 2019 engine in the 2013 thinking that THAT WS going to improve my mileage. Nothing changed. I swapped out the wrong component 😂 live and learn. Thanks for the video. Looks like those batteries are ALL sold out hmm

[@punker4Real]

@@JeffKomarow How does your Prius still get less then my Toyota corolla? i get 40-45MPG on ICE only (non hybrid) 1.8L even my hybird Tahoe i still get 22-23 winter gas, 23-25mpg(summer) with a fully expended hybrid battery it can't even start with the key only remote start that is how depleted that battery is..16yo.

[@camposvazquez]

​​@@punker4Realon the corolla.. are you doing any mpg mods? My Gen 2 Prius ranges from 49.5 - 55.5 mpg

[@easternblocairguns2728]

Most prius that sit for extended time of the issues. I've had three Prius, never had issues with battery. First one died bc of gas engine wore out

[@garysbraccia4980]

is their V3 battery a Sodium not Lithium battery?? coming out this month and V3 in Sept

[@edsonmartinspoli]

Where did u buy de nexcell cells?

[@michaelcharach]

How much did the Toyota stealership what to replace the battery?

[@homepc1826]

4500

[@goodoldjam]

Lithium polymers are not the same as lithium ions. They are super forgiving and as long as they have the correct charge ratings they will out live the car. The stock batteries have no balancing and you don't necessarily need it for these. If someone was that worried about it they would have been balancing the stock batteries.

[@pjanoo6973]

Its entirely your environment that effects your mpg. I have the original battery and get 55+ mpg on average.

[@eivis13]

Wait, i get 47.2mpg with a gen 2 prius, stock battery and winter tires in autumn weather. During the summer i get anywhere from 50 to 70 mpg. Not really worth the money if you ask me.

[@MrApinder]

Is Nexcell still on sale?

[@richardmccombs617]

He switched to sodium battery's this year.

[@ვალერისუხიშვილი]

Hello. Where can I buy this?

[@genxiong2695]

Why do people go off from the MPG in the dash? It is not truly accurate. It is off +/- 3 to 5 mpg. Just do a simple math at the pump the next time you fill to get a true reading. Miles driven / gallons filled (starting from a full tank) that's it folks.

[@psxanarchist]

all I can say is you're driving the Prius too aggressively (engaging engine) instead of slower battery acceleration & coasting. Moved to Dallas & got my 1st Prius there & even with in town driving, I could easily get 50-59 mpg on original battery (2007)

[@chrisw1462]

So the App that said you need a new battery was made by the same person/entity that sells you the battery?? And you TRUST that??? Did you even try for a second opinion? Did they modify the charging voltage/current? NMC and LiFePO4 batteries have very different voltage specifications. If the Prius tries to charge the LiFePO4 to the same voltage as the NMC, it will destroy the battery.

[@JeffKomarow]

Hey yeah the Car, the app, and yes another android phone app all say the same battery warning.

[@mysticpeeks5509]

All the mpg savings in a hybrid are wasted amd oaid in doubble at the end of the day...!! Hybrid vs non hybrid

[@josecuervo13499]

I have a 2010 prius. The car has 471,000 miles, and I consistently get 55 mpg. The best I got was 72 mpg on a long trip (I have pictures to document the achievement). The car had been driven 450+ miles on the trip meter to show that was an accurate reading. I have replaced the hybrid battery 3 times. The last two times were through green bean battery because they offered lifetime warranty. It's all on how we drive the car. I'm sticking with Green Bean battery because they come out to my house to replace it, and it has lifetime warranty for about $1,700.

[@LosPollosHermanos213]

how long did the greenbean last before having to claim warranty on it? Was it a hassle to book an appointment for them to come out and warranty the battery?

[@josecuervo13499]

@@LosPollosHermanos213 it took about 150,000 miles before I had to replace it again. It’s about the average. Usually 120,000 to 150,000. No, it was not a hassle. Usually it takes them a day or two to come out to you and they replace it within an hour or less. I got the lifetime warranty on it so I do not worry about paying again. I think it’s an extra $100 dollars.

[@fancycode]

I am wondering what else parts had your replaced, for example fuel pump, abs pump, water pump

[@josecuervo13499]

@@fancycode I just replaced the transmission. My fault. I never serviced it. Brake master cylinder at 450,000 miles. Again, my fault. I never replaced the fluid. Brake pads and rotors at 370,000 miles. The pads still had 40% left. The interior fan at about 470,000 miles. Tires and oil change as needed. Head gasket at 286,000 miles. Right rear wheel bearing at 400,000 miles. Shocks at 470,000 miles (replaced with coil over shocks and lowered it). That’s it.

[@johndouglas3724]

Thank you all...I have a 2010...gd to see what I should do or expect...I need a HV battery rt now...shopping options

[@EugeMM]

good job. ) But my experience with nexcell. is bad I bought it 1.5 year ago as a version 1. In 8 months my car stopped performing. I was told i need to update to version 2. in another 7 months it stopped working again. now I was told version 2 was a hiccup and it is not working and go back to version 1. what a joke after spending 3k grand. it appears the battery workmanship quality is bad, technology is not proven. zero warranty. hope for the best with your car

[@kurtrhoney121]

Had my inverter blow out after I installed the same battery and nothing but problems just trying to swap in another temporary battery in the car to get it to the dealership for a warranty swap out. Sold the lithium to someone just to get rid of it after more issues and ended up with a refurbished pack that worked great.

[@EugeMM]

the same

[@charleshorseman55]

There is nothing you can do about cold driving with LiFePo4 (these cells). It's the chemistry. Warm weather? Sure! Any LiFePo4 is going to degrade in cold weather unless you are very careful about DRAWING rather than CHARGING (which will go over the heads of most people). There are new sodium cells, but they have their own strengths and limitations. A the end of the day, NiMh is all-weather manageable. LiPo4 requires CARE. You can't just park the car for a week in cold weather expecting the pack to perk up. You have to DRAW power first. (to warm them) before you can LET the icu/inverter the CHARGE them. Toyota themselves talk about this (and why there are such elaborate systems in place to control temperature with electric cars).

[@bryanhildebrand2251]

This would be a great upgrade. Unfortunately you can't get any. They are always sold out. Upgrades are no good if you can;t get them. 🤔😞😠

[@Techblair.]

Thanks for producing this video my interest in the Prius model has been skeptical but after watching this video I think I will find me a cheap Prius and get this battery package to save on gas

[@Megacatares]

Just ordered the v2.5! You are buying into the reliability of Lithium as well!

[@AC-bz5br]

How did you get a hold of it? My understanding is that they have been sold out for a while

[@Megacatares]

@@AC-bz5br put yourself on the alert list. They come back in every couple of months. When you get the alert immediately buy it. It sells out in a day or 2. I missed the first alert and had to wait 3 more months for them to come back in stock. Have not installed it yet will do it on a nice weekend.

[@anthonyreid7221]

My project lithium battery is 2 years old now, still functioning. I upgraded it to version 2.0 ~6 months back. Little worried about the temps the pack reaches. Have to send it back to jack for 2.5 modifications but trying to hold out for v3

[@Kuya_D_Z3]

Back in stock today ​@@AC-bz5br

[@tunedime]

@@anthonyreid7221when will v3 come out I have a Prius v

[@AshleyMckendree]

lol 38 to 48 is almost a 30% increase in MPG so yeah thats amazing

[@TheGovernment-ry2hj]

You see that pink one with the Lithium swap that caught fire? Definitely some hobby level stuff going on so be careful and carry a fire extinguisher! Maybe consider doing manual balancing or whatever preventative maintenance might end up being needed!

[@theairstig9164]

Fire extinguisher vs lithium battery. That is some next level hope

[@Islamisthecultofsin]

@@theairstig9164 I always gasp when I see people putting plexiglass on the cover so they can see the lithium cells.

[@Snerdles]

I wonder if you could install a 120V battery charger so that you could top up the battery overnight like a plugin hybrid, that way the engine wouldn't need to cycle as much for the first little bit of driving. I drive a little Hyundai PHEV doing delivery and regularly use either no gas or hover around 1-4L/100km (which is about 55 - 235 US MPG, excluding electricity use) depending on conditions. As an example, yesterday thanks to nice weather and some charging opportunities I drove about 42 miles and my engine didn't turn on all day. The electricity works out to cost8ng only about 3-4 cents per mile in my area, which is nice.

[@brucey5585]

You can, just build it yourself. But the issue is finding a 120 volt converter. You would need to convert you 120 ac house to 120v dc or have a solar 48v convert to 120v.

[@Snerdles]

@@brucey5585 wouldn't almost any charge controller do that?

[@GrandPrix46]

The battery in a Prius is more like a capacitor, it's not a massive battery like what's in a Chevy Volt. It's designed to charge/discharge many times in a drive cycle. It would be a complete waste of time charging the tiny hv battery in a Prius to drive maybe 3/4 of a mile before its discharged. There's a plug-in Prius already for what you're suggesting.

[@Snerdles]

@@GrandPrix46 The battery he put in there is just a regular lithium battery and is probably close to 3kWh, the Prius generally keeps the battery between 40-80% for longevity but after running for a while it's going to be almost always closer to 40, meaning you could charge it to be 100% once a day and get an extra 6 miles or so worth of energy before the Prius needed to force the engine on at 40% again. It would significantly improve overall mileage if you could figure out a way to do it cheap enough. Plus, the battery is probably rated for 6000 charge cycles, which at once a day is over 10 years anyway.

[@dstr1]

I own a 2019 all wheel drive prius living in Boston. The technology for those engines 🎉 are much more advanced. I use to get about 65 to 70 mpg. But I e been owning hybrids for many years. Before the 2019 I had a 2017, and a 2015 before. the 2017 used lithium. I got about the same with the 2017 too. My wife drives the 2019 presently, but she gets about 35mpg. Since she only do very short trips. She does less than 5k miles per year. I'm driving a ModelY presently and it seem to be more efficient than the priest. Well electric energy is much cheaper than gas.

[@vevenaneathna]

2000$ for a 1.5kwh battery. im crying man, wholesale lifepo4 a 1.5kwh battery costs around 100$. well when you dont work on cars you gotta do what you gotta do. still better than buying something new and depreciating. currently building a 3.5kwh lifepo4 12v battery for my car, costs 328$ on the slow boat from china

[@consumercellc1109]

Nice, I'm looking to do the same. Where are you getting your info?

[@vevenaneathna]

@@consumercellc1109 for some reason my coments get removed but theyre 280ah eve cells from ally excpress. took about 1.5month to ship. i think they were about 80 usd per cell after tax and shipping and work fine. installed in my chevy volt 2013 in place of the agm battery and work fine because of the 200w of solar which keeps it charged up. i used some nicer flexible busbars and an inductive active balancer instead of a bms and then added a heating circuit

[@zacharytracy3797]

I’d love to know as well indeed

[@asdsad17]

hypermiling means you're going 30MPH on the highway.

[@natecaine7473]

hypermiling means you're running stop signs, too

[@dosal310]

Thank you for the updates . This battery is always sold out

[@EugeMM]

And owner is broke

[@ipviri]

38mpg to 48mpg is 10 mpg, which is a 26.31% improvement!

[@billybbob18]

I kept thinking the same whenever he said 10%.

[@JeffKomarow]

The estimated 38mpg is from my battery in bad failing condition, the 10% improvement is comparison to a stock battery in regular working condition.

[@garysbraccia4980]

I am surprised you needed a new battery at 104k miles??

[@JeffKomarow]

Yeah the car spent time in high humidity and the corrosion on the terminals got to it soon enough.

[@EspHack]

Lead acid, nicad and all that garbage still being on sale is just baffling to me

[@MrTrevorkemp]

Realistically, the only time that you actually see an increase in fuel economy when replacing your hybrid battery with something that is meant to be an oem replacement, including this lithium upgrade is if your battery was fairly low in its capacity compared to original That's going to be the only thing that's going to make a difference and really get you better. Fuel economy is if one of your primary issues with your battery was it just didn't really have any capacity and now you have a lot more capacity for storing energy The most common reason that the Prius batteries fail is cuz corrosion on the terminals and or modules in the battery become out of balance and then it throws the code and then you need to refurbish the battery or get a refurbished battery. I'm talking from experience myself. I have a 2012 Toyota Prius V package 2. It's factory hybrid battery failed at 400,000, mi and 11 years old I replaced the battery and saw no real change in fuel economy it stayed the same and did not improve and the reason my battery lasted so long is cuz it is not a coastal car. Never was. It was sold brand new in Kansas and then I bought it and I'm the first person to title it in the state of Colorado. It's only ever been registered in two different states and hasn't seen much driving activity where it was in a humid environment which is why it's battery lasted 11 years and 400,000 mi I called green bean battery solutions and with the lifetime warranty and replacing the 12-volt battery as well. It was $2,250 for me to get a refurbished battery that was still a nickel battery and the company itself the name that he could not remember where he only got the first part of it is green bean battery solutions I am about to turn over 442,000, mi on the odometer right now if anyone is curious.

[@77.88.]

Its ODD that my 2013 has a Nickel Metal Hydride and the car has 193,000 miles and it runs perfect without problems 55-65 mph 50-53mpg on a trip with more than 250-300 miles round trip? Is it possible that your battery pack has a lot of moisture from somewhere or is your battery pack a Lithium ion battery?

[@tariqhameed3877]

Can i install lithium ion battery in my prius 1500cc?

[@AJPerg]

That car looks familiar!! Great video man!

[@recorrelavida9104]

Gracias así vamos aprendiendo

[@quartamile]

How many kwh is the battery?

[@mirceamunteanu4791]

Get a new Prius has 196 BHP and AWD, for me I wish it had a bigger gas tanks, as I like to go on very long road trips

[@Harrythehun]

No breaks?

[@stephenwhite5444]

Did they figure out why this happened?

[@u3b93]

The guys making the Nexcell Lithium battery are not telling you the whole truth. These cells build quality is questionable, can it really handle the high amperage current it claims when you look at them. For sure they did a good job of replacing the chemistry of the NiMH with LiFePo4 and adding cell balancing, but there is more to that, what they don't mention anywhere is the software of the Toyota Hybrid system is not touched. The car has no notion it has a bigger battery in terms of capacity (Ah) and there is no way that it will make better mileage for what it what it was calibrated for! Its good as a battery replacement, but too many customers are complaining about the Nexcell cells failing. Wished the product was better well designed or else there would not have been so many revisions, they should have done it right the first time . . . They are taking 2 Toyota modules of NiMH {known as a blade in Toyota jargon} and replacing it by one Nexcell module, from 12S to 5S, they should be given some credit for that.

[@gustavomartinez324]

Don’t break ur head just check voltage minimum block number a maximum block number compare the voltages of more than 1.2 volts the Ecm will log a P0A80 if it exceeds 1.2 volts u don’t need Prius app u can check it with 4 system scan tool

[@robertsherertz]

This will make your calculations much easier your car like mine holds 10 gallons so you feel the car up set the tripometer reset it rather and then you do the math when you float up next time if it takes 9.38 gallons you divide that into your mileage My computer is always off by about 2 MPG. So it says 46 My calculation always comes up about 43 and a half 44

[@GrandPrix46]

They have 11.9 gallon tanks.

[@robertsherertz]

@@GrandPrix46 That's what it says, but when was the last time your Thurs generation Prius took more than 10 gallons I must have a huge reserve That's like 90 Mile reserve pretty sweet I guess you don't overheat though fuel pump then either. Either way you're going to have to do the math by what the tank takes you filled up all the way you run it until the fuel light comes on and then you can fill it up again and do your math and reset the tripometer so you can do it on any car 10 gallons makes it easy though.

[@robertsherertz]

Mine usually takes 9.6 gallons The computer's saying I have like 10 mi left I'm in Southwest Virginia small mountains delivering pizza. For what it's worth Shell economy 87 seems to have the best gas mileage when I filled up over the years and I tried different places and until I've got bored with seeing the same results over and over The computers are usually off by like 2 mi on its estimate of constant MPG saying I get more than I really am.

[@davidwright1752]

Exceptional value. These Prius are a favourite for the taxi industry. They last 300k to 500k miles the CVT is the most reliable in the world. This CVT is in all Toyota hybrid including Lexus. From memory I think the water pump for the radiator cooling is about the only thing that will need changing eventually. Bugger all goes wrong with the vehicle. However it’s just basic transportation. The Camry is a big improvement. Same deal extremely long life vehicle.

[@charleshorseman55]

It's the inverter coolant pump that goes. It's pretty easy to replace, but it fails often enough that there should be a backup at ready.

[@davidwright1752]

@@charleshorseman55 Thankyou I the wrong water pump. Complaints of one to replace a bit expensive and the taxi company had a part made to replace part of it from memory. Change over batteries recond. $1500.

[@jamesalles139]

what shop where? thanks for the video

[@JeffKomarow]

Hybridpit they are A+

[@jamesalles139]

@@JeffKomarow thanks (and for the video) Hybrid Pit Stop Buena Park. California

[@soulpreppanumbaone]

Where did you getthe upgrade done?

[@johnmanning8982]

My 2005 was getting 29mpg. I put the LiFePO4 nexcels in mine and now reliably get around 42mpg. That’s a HUGE improvement! And Jack’s customer service is outstanding. I’m not sure why you don’t feel the improvements you’ve seen are not great. Over time I think you’ll be very glad you made the choice you did. I know I am. So congratulations to you.

[@JeffKomarow]

Oh I do think the improvement is great I’m just saying the shop did say I could get 5mpg more. I believe it is more about my car not tuned to perfect performance and driving style in the city holds it back.

[@thesmuler5627]

Been there done that. The problem is the hybrid battery management is not designed for Lithium Iron Phosphate and Nickel Metal Hydride characteristics is very different from Lithium based battery where charging is very dependent on voltage. What happens is repeated over discharge result in battery premature failure. Lithium Ion actually does a better job when it comes to upgrade although more dangerous. I have upgraded some cars on both Lithium Ion and LFP. I find lithium ion to last longer and has better performance not to mention lighter battery pack weight more power density result in better performance as well and lithium ion are more robust than LFP.

[@camposvazquez]

​@@JeffKomarowin the video pre batter you state 38 mpg.. towards the end 48 mpg... That's a 10mpg improvement.... Am I missing something??? Thank you for the video... Getting these batteries as soon as my pack degrades

[@practicalguy973]

With a large lithium battery inside the cabin of your older Prius I would have a quick escape plan including a window break tool and gloves to get out quick if the battery goes off on you. Lithium batteries vent some really nasty toxic gases when they fail. LiFePO4 specifically vents 5x hydrogen compared to their physical size. That can go boom if the right air gas mix is reached inside the cabin.

[@laura-ann.0726]

Going from 38 mpg to mid-50's in a Prius after installing a new LiFePO4 battery is not unreasonable. What the new battery will give you, that improves your MPG, is much more access to energy recovered by regenerative braking. If you have to sit in heavy traffic, the engine will not need to run as often, and thus won't waste as much gas. Good luck! We have a 2020 Corolla Hybrid in our family that will eventually need a new battery, so I hope you get good value out of this battery swap. Also, I want to advise you that if your Prius is approaching 120,000 miles on the odometer, or if you are already past that point, you need to be preparing to swap out the spark plugs and ignition coils. 120,000 miles is about as long as these parts ever last. The good news is, Toyota coils don't cost much, between $50~$80 each depending on where you buy them. Replace all four even if only one has failed, and of course install new spark plugs. If you are handy with tools, they aren't difficult for a DIY car owner to do the job.

[@nadeem5476]

lithium ion is highly combustible

[@kn4cc755]

So is gasoline.

[@nadeem5476]

@@kn4cc755 HUH . gasoline can't be changed !!!!

[@urntwrthyZ]

Don't park that car in your garage. You didn't do enough research.