$493 Aliexpress 45Ah Grade A, YinLong Lithium Titanate (LTO) Cell Testing

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[@WillProwse]

Update: The BLS store is giving me a full refund for the issues I experienced with their LTO cells. They said that they made a mistake and the cells were not labeled correctly. They wanted me to remove the video, and I refused. I told them that this will be a lesson to ensure that it never happens again. I still do not understand why these problems happen so often with battery distributors. This has happened on numerous occasions w/ multiple suppliers. Hopefully my video will teach the other companies a lesson. Previously, I did like the BLS store, and I have bought some really nice cells from them in the past. I am glad that I was ripped off before my viewers were. Who knows how many people they sent these cells to. If you bought these cells, test them and return them if necessary. ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Does off-grid solar confuse you? Check out my DIY friendly website for solar system packages and product recommendations, and so much more! www.mobile-solarpower.com Join our DIY solar community! #1 largest solar forum on the internet for beginners and professionals alike: www.diysolarforum.com Check out my best-selling, beginner-friendly 12V off-grid solar book (affiliate link): amzn.to/2Aj4dX4 If DIY is not for you, but you love solar and need an offgrid system, check out Tesla Solar. Low prices and great warranty, and they can take your entire house offgrid with their new Powerwalls: ts.la/william57509 ~~~~~~~~~~~~~~~~~~~~~~~~~ My solar equipment recommendations (Constantly updated! Check here first): 12V/48V Lithium Batteries: www.mobile-solarpower.com/solar-batteries.html Solar System Component Directory: www.mobile-solarpower.com/solarcomponents.html Plug-N-Play Systems: www.mobile-solarpower.com/full-size-systems.html Complete 48V System Kits: www.mobile-solarpower.com/complete-48v-solar-kits.html DIY Friendly Air Conditioner/ Heat Pumps: www.mobile-solarpower.com/solar-friendly-air-conditioners.html Complete 48V System Blueprint: www.mobile-solarpower.com/48v-complete-system-blueprint.html ~~~~~~~~~~~~~~~~~~~~~~~~~~ My Favorite Online Stores for DIY Solar and Coupon Codes: -Current Connected: SOK, Victron and High Quality Components. Best prices and warranty around: currentconnected.com/?ref=wp -Signature Solar: Cheap Server Rack Batteries and Large Solar Panels: www.signaturesolar.com/?ref=h-cvbzfahsek -Ecoflow Delta Official Site: My favorite plug-n-play solar generator: us.ecoflow.com/?aff=7 -AmpereTime: Cheapest 12V batteries around: amperetime.com/products/ampere-time-12v-100ah-lithium-lifepo4-battery?ref=h-cvbzfahsek -Rich Solar: Mega site and cheaper prices than renogy! Check them out: richsolar.com/?ref=h-cvbzfahsek -Shop Solar Kits: Huge site with every solar kit you can imagine! Check it out: shopsolarkits.com/?ref=will-p -Battery Hookup: Cheap cell deals bit.ly/2mIxSqt 10% off code: diysolar -Watts 24/7: Best deals on all-in-one solar power systems, with customer support and distribution here in the USA: watts247.com/?wpam_id=3 ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Contact Information: I am NOT available for personal solar system consult! If you wish to contact me, this is my direct email: [e-mail] Join the forum at diysolarforum.com/ if you wish to hang out with myself and others and talk about solar FTC Disclosure Statement and Disclaimers: Every video includes some form of paid promotion or sponsorship. Some links on this youtube channel may be affiliate links. We may get paid if you buy something or take an action after clicking one of these. My videos are for educational purposes only. Information is subject to change/update at any time. Electricity is DANGEROUS and can kill. Be smart and use common sense :) DIY Solar Power with Will Prowse is a participant in the Amazon Services LLC Associates Program, An affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com

[@Eratas1]

Thanks for the reveal. Sounds fishy to me. I think many battery companies do this.

[@apainlessone]

I doubt they would admit that to anyone else...pretty hard for them to defend after all the testing You did.

[@pteepan2708]

Thanks for that, so you can ignore I bit of my last post. You are Epic. Yes, let them learn from this, I hope you don't have to pull the video down.

[@JoniK1]

I've bought all my 40Ah cells from there, kinda weird that those 45Ah are grade B's and 40Ah are grade A's. I have same capacity tester you used earlier, thanks for the link btw, and got 42Ah out of them

[@stephsoltesz6731]

Thanks for the Vid and NOT Taking it down ! Such reviews are Lessons for vendors & customers too. Any frauds / misrepresentations intentional or not must be put into the open for everyone to know it is happening. Out of curiosity. Do the date codes match ? Production codes printed on the cells ? Is it possible that they are New Old Stock that have been laying around in a warehouse for a period of time ? Should not be a factor unless something happened in storage, freezing or ?

[@mitch60mccoy]

Will, your info is always so helpful and it takes a lot of the guess work out for us rookies. Much appreciated.

[@frankszanto]

LTO is favoured for transport applications - like trains and light rail where regenerative braking gives high charge rates. And also the high cycle life is very important. But as you say, these are not requirements for solar.

[@CheekyMonkey888]

so I take it on a catamaran with regen capable props this would be the chemistry to use, plus the safety aspect is important too, plastic boats are highly flammable

[@alexyoung8983]

What about audio

[@thriveforbest3217]

I need help guys but please someone who truly understands it 🙏 8k RMS system in the car going ✅ I have 6x 45ah Can I simply delete my car AGM battery 🔋 with still running OEM car alternator (120amp ) And just use 6 x45 cell bank instead + BMS Can someone please tell me the correct way using these cells in my car audio project ❤ thank you 🙏

[@bertschramm7285]

Hello Will, there is an easy way to tighten the buss bars properly with no danger of damage to cell. first put a nut on the threads flush with the base of the cell, you do not need to put any torque on the nut. Then put a buss bar on, then add a second nut, when you want to tighten the buss bars, you use two wrenches and the inside nut is screwed to the outside (as if you wanted to take it off), and you tighten the outside nut, there will be no tension going into the cell, you are only locking the two nuts into the buss bar. In some cases, you may need thinner nuts.

[@steventayman4109]

Also, calendar aging seems highly unlikely for these cells as most researchers on calendar aging agree that the cause of calendar aging is the graphite anode which isn't present in a lto battery

[@WillProwse]

Oh good point. I did not think of that difference.

[@herobrine00700]

@@WillProwse where did you get that 6s lto bms? ive been looking for weeks. i have 2 bms that arent the right ones

[@catch22frubert]

​@@WillProwse Hey Will, I know you haven't done anything with LTO batteries for a long time now, but if you want real 45Ah grade A cells, you can get them from an American company called XS Power. They make a lot of extreme car audio batteries, and they used to have lots of Lead Acid batteries, but they have recently started offering rebranded Yinlong LTO cells and they also bought the intellectual property from the largest and best super capacitor company there was. I believe it was Maxwell or something close to that. They made 3000 farad super capacitors, which were very useful for extreme car audio since capacitors can charge and discharge almost instantly, and they can charge and discharge in low temperatures. LTO cells have lots of benefits for car audio too since you don't have to worry about the temperature as much as with Lifepo4. Plus, LTO's charge and discharge very quickly at high C rates. Thats perfect for car audio. Hence why they are being rebranded and sold by XS Power along with the 3,000 farad capacitors. Its a great combination to use the XS Power/ Yinlong LTO cells in combination with 2,000 to 3,000 farads of capacitors. So, if you want to try the 45 amp hour XS Power cells or their capacitors, I can say they are regarded as a top battery brand in the car audio space. Limitless Lithium is another big company that has really expensive high C rate Lithium batteries for extreme car audio. It would be extremely interesting if you did a high C Rate output challenge between the Yinlong cells, proper Grade A 45Ah XS Power LTO cells, Headway 38120HP Cells to represent high output Lifepo4 cells, and maybe 2 AGM Lead Acid batteries in parallel. Pit them all against each other in a showdown and a teardown. See who has the best high output cells in the consumer space. That would be incredibly interesting to me and about 100,000 other people who use Lithium batteries in high power car C audio builds

[@raydreamer7566]

I m so glad that someone like you are testing and exposing fraudulent battery suppliers. Thanks for the info...

[@CanadianWinters]

I think these cells would be great for campervan and van dwellers that live in their vehicles in winter, especially in cold places like Canada. Also, the safety factor in this specific case is a huge plus compared to other lithium chemistries. Keep up the good work, I am eager to see the cold temperature test!

[@thalesletus1]

glad to see you finally got a good battery tester. had that one for over a year now works great

[@volvo09]

looks neat, I need to look into one.

[@RVwithTito]

Great feedback. Thx. Definitely an easier way to test. I just ordered one.

[@vincei4252]

If you have to jump thru hoops to buy grade A cells without getting ripped off I'd just skip the entire brand. It's that simple.

[@thesurvivalist.]

I went with LG LTO 12v batteries, China’s middle name is scam!

[@vincei4252]

@@thesurvivalist. You can say that again.

[@redsquirrelftw]

Honestly this is what keeps me on lead acid. I can walk into Canadian Tire and buy lead acid batteries, or I can buy from a solar store. With lithium it's a big gamble if you're getting something good or not as there are not many legit places to buy them from. At least not here in Canada.

[@BrevityBuzz]

@@redsquirrelftw with lead acid you can just create your own. Depending on how you make them you can make them last veeery long

[@9lbloodnolast873]

Imagine having the guy doing the video know that is the conclusion and you watch the video only to find that he knew wall along they were grade "b" but had the video labeled grade "a" anyway. Dump the reviewer and the product.

[@MihneaStoian]

Sounds like a great solution for boats in northern climates, especially where the temps in winter go far below freezing and the boats are kept on the hard with no heating.

[@cruiser97eric1]

Winters in the south get very cold too. Take a look at Antarctica if you want proof.

[@haraldhannelius]

Then again You don't charge when it's cold.

[@rdmevX]

I'm thinking another possibility is they may be grade A cells rated for either 35 or 40ah but just marketed as 45ah cells

[@herbertwerner2287]

Sounds about right.

[@josip1881]

Yeah lots of compaanies do that, over-rate their product.

[@joewamsley8004]

Especially chinese companies....

[@herbertwerner2287]

@@joewamsley8004 copy that.

[@joewamsley8004]

I've gotten so used to ragging on china and thinking they are dishonest I keep forgetting the incompetence and hubris. Haha. I know a lot of people that went there to help them get plants working. The Chinese just assume they did it right, without validation. It wouldn't surprise me if they thought these were really as specified. I seem to remember a CPU manufacturer pumped a few billion into these great micros 98% failure rate... now they sell the originally 16 core micros as 4-8 core and they still haven't worked through the backlog.

[@nuance2317]

Thank you,! This technology is of great interest to me as I winter camp in northern Minnesota.

[@manuelgonzales2625]

Sadly 90% of Ali's sellers are scammers, either they are selling B grade instead of A, or they are lying about actual capacity. Aliexpress is a basket of crabs. Thanks for all your test.

[@AustinTXRealEstatebyFelix]

Thank you for your work. We need more people/teachers like you in all industries. Keep it UP!

[@RyanHeaney42]

You’re too hard on yourself! You didn’t “mess up,” this was simply a false listing.

[@RyanHeaney42]

@@chasmarischen4459 Not sure whose advice that is, but I always thought a healthy person should calmly look at the facts first before assigning any blame.

[@JasonSmith-utube]

What about the fact he knew they were not grade a and still posted a video saying so just so you watch it. Clickbait.

[@alfredrein699]

My Yinlong LTO 40Ah has exact 1,236kg. Measured actual Cap. is 43,6Ah. Since 3 Year in use for Solarenergie. Twice I accidentally unloaded these cells to 0 volts for several days. Cells are still new, better than 40Ah. Great Cells. I have pay 15 Dollar for each cell in 2018, have 132 pieces.

[@alexyoung8983]

From where

[@alfredrein699]

@@alexyoung8983 OSN-Power. Price is now $40 😞 5 years later

[@nezarnielsen6605]

Let us know in 20 years how they're holding up!

[@clintonreese9081]

From link, "If the weight is not enough, it is very likely to be 35AH or 40AH". Did the batteries weigh as much as they say in the link given, 1260g?

[@rkan2]

sub

[@corneldinca9661]

Is riding 45 on battery

[@bohenderson]

Hi William, I love to watch your videos. I have dabbled in Hybrid Power Systems for over 10 years. During this video you down play the value of LTO high C rate. And for solar power, I agree. However, on a personal note, I have a Bad Boy Buggy, which is basically a souped up 4x4 Golf Cart. It has 8 each 6V 200A-H Pb Acid batteries in series and pulls 500 Amps. If I could get 100A-H of Li batteries that could handle 500 Amps at a reasonable price, I would switch over. In this case LiFePO4 cannot handle the C rate that I need. LTO is the only way to go. The limiting factor seems to be the BMS. The one you showed is good for 100 Amps. So, just a side note here, LiFePO4 cannot handle all applications. Keep up the good work.

[@brendontait6968]

Hey Will, sorry to see you got bad results... again - Aliexpress can be so unreliable and I'm sure that many cells get repackaged... Just an FYI, my 40Ah cells that I used in my videos which all tested over 40Ah were $34.50 plus shipping. It can be so difficult to find legitimate suppliers. I did quite a lot of research before I bought mine.

[@ghettorun420]

Same cells? If so can you share a link for the supplier?

[@rvamerongen]

Please , can you supply us with a link? Or a PM will do also.

[@ghostwriter6699]

excellent video and as usual no animals were harmed or injured in the making of this video

[@chrisbritton8326]

Thanks for the video Will. I was board and looking at battery hook up web site and saw the prismatic lto cells. I haven't owned or worked with this kind of chemistry of lithium. I was impressed with the cycle life and that it might out last my life. I'm 49 years old. I wanted to learn more before I bought any of them. That's how I found your video. I noticed that you made it 5 years ago. Have you thought about making a new one with new information that you may have discovered or learned since then? Well I gotta go. Got solar pannel adjusting to do. I love your videos. Keep making more brother.

[@Electronzap]

You didn't mess up. It was a learning experience. Battery companies are very misleading and that won't change any time soon unless people learn how to catch them.

[@CraigOverend]

The Zenaji Aeon recently added to the Australian Battery Test Centre use these Yinlong. We'll see how long they last.

[@AM-us7cz]

Could you please explain what Zenaji Aeon is. Thanks 👍

[@CraigOverend]

@@AM-us7cz Zenaji is an Australian company making batteries for the home market. Their Aeon line of batteries use Yinlong LTO.

[@Aaron_Peters]

Great video! I'm following and I agree that most people will not have a use for these cells, but they are perfect for the Ice Fishing industry in Northern US / Canada. That is what I am using them for.

[@marcusaetius9309]

“Testing in freezing cold temperatures “.. That’s what I have been waiting for. Well done!

[@crazystuffproduction]

hes done a few

[@codiecarroll735]

You nailed it by mentioning the fact Lifepo4 is the way to go atm as by the time good Lifepo4 cells have reached end of life, solid state battery’s will be available

[@JosiahHague]

Thank you for taking the time and working through proper troubleshooting progressions. It is a bummer they're grade B, and I'm looking forward to some grade A action!

[@davidgiles4884]

Love your content! But just a bit of criticism - please don't top balance by bus barring together. The inrush of current in low resistance cells could be momentarily 1000's of amps. Its best to charge the low cells with a conventional charger so the 3C charge limit is respected.

[@WillProwse]

Oh absolutely! But the voltage differential was low, so it was fine to do it this way. Usually I do not do it this way. I have a few videos stating what you just said.

[@afanasof]

hi, i work with battery suppliers from china for about 5 years and if talking about LTO cells - there is lots of interesting stuff hapening with such cells in china and it's very tricky to get exactly what you need, first 45ah Yinlongs cells i got about a year ago and on 2C test (my single cell tester only can handle up to 80A current) i got around 46.1-46.4ah and they aint cost that much in china mainland, the price is around 30-35$+shipping, quality depends only from suppliers good faith, because if we`r talking about Yinlong products - there`is no A grade available on the market and never been, only B and C grades. The only A grade cells i could get is that one i bought from Yinlong directly, but that is comlicated even for wholesale byers ;)

[@lionsnetonu]

People gave you a bad rep but atleast you did not bow down to appease them and did what you found what right. Good on your part.

[@carson3210]

Will, you did it again, created a great succinct review of a battery technology. thank you!

[@t0manderson571]

DUDE, YOU ARE SO ON TARGET. HOST THREE MORE YT CHANNELS, PERSONAL, DIY BATTERY, ANYTHING YOU LIKE. YOU ARE THE KEY, TRIPLE YOUR WEB PRESENCE. TRUST ME.

[@MrShok888]

Hi there, Firstly great video, Just to share, YL company itself does not officially sell on any E commerce platforms. I deal with YL directly( not distributors or resellers) and just got a batch of 45A cells. Glad you got your refund!

[@maggiesjourney3877]

I really wish you a happy holiday season Will. You have helped me to help so many women out here in the desert. Like I can not count all the solar installs and other DC power equipment I have put in for these ladies. I never charge but I get a great feeling helping others and gifting others solar panels and solar generators I've gotten on sale or been gifted. I'm really learning a lot on how to repair charging cables and making portable panels to charge Jackery's and other devices like that.

[@moderngunguy3666]

that used to be a lot cheaper but they cost that much now because they are widely used in car audio which drove the prices up wildly. and High C rates are needed for car audio.. so they are super popular in car audio right now

[@hariris9944]

How have to have thicker wires on your capacity tester. The voltage drop will be to high on the wires you now and you will have some heat related power losses that will affect the measurments. If you have 0.1-0.2 Voltage dropp in the wires with 5 apms discharge then you will loss 0.5-1watts, in 8 hours that will take to discharge the battery you will loss 4-8Wh or 2-4 Ah. I think that it will be a good think to check your testing setup.

[@AdamB9574]

I just bought 16 of 280Ah Lifepo4 from Alibaba at $86/pc. Supposedly brand new, grade A cells. I will do the capacity test and see if they are really 280 Ah. Will, do you think that Orion Junior 16s bms is not an overkill? Somehow I can not trust this so called low temp protection claimed on these Chinese units, seeing your reviews. I would rather spend a little more upfront. I like the CAN communication on these, just got the CAN to TCP/IP converter from ADFweb to view the battery data on my PLC and access it remotely. Thank you. Glad to see more of your videos again!

[@huangvicky9361]

Acoording to your price, A grade?Sorry I don't think so. you can test the capacity when you got them. 😂😂

[@AdamB9574]

@@huangvicky9361 don't go by the price. Have a good look around. Lifepo4 are less expensive these days. That's not surprising.

[@huangvicky9361]

@@AdamB9574 believe or not. there is no A grade cell with your price.

[@kingofl337]

When you hook the cells up in parallel without matching the voltage between the cells using some form of current limiting couldn’t that have damaged them. They could have dumped huge amounts of current instantaneously to match the cell voltage.

[@TheAHYZ]

That's exactly what I thought! I would use BMS to balance cells or high power resistors.

[@kyferez1]

They were close enough in voltage that is very unlikely. Also if that had happened we likely would have seen sparks - we didn't. I think the most likely scenario is these companies are selling used cells.

[@DIYYourz]

Just a hypothesis, maybe if you empty the battery in a longer period of time, only then can you get the full capacity, like what happens in a car. Quiet driving enables you to cover a longer distance with the same amount of fuel, unlike sports driving. what do you think?

[@yeti.communications]

Again thanks for the info Will. I truly hope that you succeed in your quest to get grade A cells before you start drawing social security.

[@peterwalton1502]

Well done Will. Us beginners appreciate you knowledge

[@popsoldboats3406]

So after about a year of watching this channel I have almost figured out what batteries not to buy. This is one of them. I bet as soon as I do buy the new battery technology will hit the market making the so called best look like a joke though. Just like my first flat screen for 3 grand.

[@redsquirrelftw]

Lol it's crazy with flat screens. When I bought my house around 10 years ago I wanted a really good TV so I saved up for a year or two and bought a 55" HD Samsung. Was like 3 grand but it was on sale for 2. Super good deal at the time. Now they are practically giving those away.

[@scantrain5007]

Many thanks for this upload. I been thinking about LTO, but now after your video I will keep my fingers away of this. As you said: Go on with the Lithium FE batteries and wait during their life time for new technology - or prices for Lithium FE batterys going down.

[@whatthefunction9140]

these would be great in my electric tractor project

[@Dedmuus]

They're terrible

[@mikebowers5083]

Thanks for the share

[@dansmith6990]

electric tractor? I'll take "Projects that will never work for $100, Alex"

[@whatthefunction9140]

@@dansmith6990 you know freight trains are electric right?

[@belspace]

Always bought batteries from Alibaba and never had a bad surprise.

[@steveshea6148]

Interested in building an LTO pack for long distance ebike touring because of the high charge rate. The ability to travel 45 miles, potentially get a full charge off of any standard household outlet in 20-30 minutes while having lunch, and proceed is very practical for that use. Will need to pull it in a trailer though because of size and weight . Thanks for the video .

[@Me-yw9mi]

LTO has a linear voltage VS discharge graph. From 2.8V to about 2V. At 38Ah the equivalent Wh is about 2.4 x 38 = 91.2. For a constant 2V battery this is about 45.6Ah. Wondering if they are using advertising liberty to claim Wh to Ah. Would not be the first time someone is doing fuzzy math advertising. Nah. They just ripped you off. Glad you keep them honest. Love the work you do !

[@sjetmand]

Yo Will! Something seems a bit off with the frame rate / shutter speed maybe.Try bumping your shutter speed up to like 1/60 and adjust ISO to taste / ISO auto.

[@sethgt1234]

I have only seen 40hr and 35hr Yinlog cells. I have a 120ah bank and I could not be happier. I am using them in a car audio application, but don't knock them yet.

[@richardzan4077]

I have been doing tests on these batteries for 2 years. The problem that these batteries after charging up to 2.8V are quickly discharged automatically. In addition, each cells does not charge correctly. So at the moment of electronic calibration you will lose the total battery voltage. So, after a whole day of calibration, you need to recharge them again. I have batteries of the same company as you. I approach these batteries sold by individual Chinese shops are waste (bad somehow) from a large company - Yinlong. To buy good batteries, you need to apply directly to the manufacturer

[@solarwiseph4573]

It can be useful for solar power as PEAKER storsge when the sun only shines (peak) for 1-2hrd hours a day. at maxium (10 c) you can store 5KWhr of energy in 10mins.provided you have a lot of solar panels. At that rate you could charge your entire battery bank in no time and use it for the whole day.

[@paulplack490]

Sadly, on two recent electronics orders from China I've had QC issues. The good news - Both vendors have quickly shipped entire replacements without asking for the old ones back. I have yet to assign a cost to becoming their QA Department, however.

[@macthompson9750]

The market for cold weather is greater than just Antarctica. im in the continental us and ive seen it get -65f. so northern us, canada, alaska, russia, northern europe, the arctic are all areas that have use for batteries like this. especially in industrial applications. oil and stuff

[@hfbs4321]

you do an incredible job! Brazilian greetings!!

[@Zer0phobia]

That's wierd Will, I have the 40ah LTO grade B cells on my electric motorcycle pack and I've capacity checked them but still got the 40ah capacity. I've since swopped to 32650 6ah 3C lifepo4 cells. 332 of them lol. I'm falling in love with lifepo4. I mean if I can get up to 6000 cycles then that's perfect, even after that I'll still have 80% capacity. Also the reason there is so many grade B cells is because the Chinese use the LTO on applications and probably are required to swop them out after a certain time period, this is especially true for medical and public transport applications. Instead of throwing them out they sell it to us. That's my theory. Thanks for the vids!

[@dahrafs9798]

How is your LFP holding up after 3 years?

[@Zer0phobia]

@@dahrafs9798 still going strong!

[@ProDigit80]

You can very easily install them in series, and get a 24, 48, or 96V system. The current doesn't change on series connected batteries. For solar cells, if you use many, you can very easily upvolt the 12V output to 96V, which is much better for long power leads, before charging the pack. Maybe 100 amps isn't what you would use at 12V, but it's perfectly fine if your system is a larger system (like a solar farm) at 96V, or even 192V.

[@alext8828]

Solar batteries for standby systems do experience high C discharges to run appliances.

[@ndudman8]

How does the refund process work with Aliexpress... dosn't look like your sending them back, are they just refunding you partially ?

[@izzzzzz6]

Inside is probably a samsung 40T and a buck converter. Try some extreme conditioning and see how they perform after a thrashing

[@wilfredstewart3348]

I actually burnt down my 4 year old house charging lithium titanate cells at 3.7 volts because I forgot I had used the dc to dc converter previously to charge 3.6 volt cells. When I checked on the voltage whilst charging the voltage reading was 2.6 volts due to voltage sag at the battery terminal.

[@daan3298]

Why? Electric busses / public transport. The use case fits and China uses them a lot in the cities. Too bad you got grade B again. Bought mine in Europe as 40Ah and they test as such. Not sure where you got the info from that 24v isn't a good fit. I use them with a Victron EasySolar 24/3000/70-50 and that works perfectly fine. Just yesterday I ran them down to 3%, drove to a hookup and charged them within 2 hours with the EasySolar (basically there's a MultiPlus inside next to an MPPT and more). My high voltage is 28.6 (2.6v per cell) and low is 19.8 (1.8v per cell). The Victron EasySolar / MPPT / MultiPlus inverter work fine. Every 24v load I've put on it works fine too. Never had any device complain about voltages being either too high or too low. 33 cells in 11s3p 40Ah each, total 120Ah in 24v. I get ~3000Wh at +97% efficiency from them, measured over and over again. 1560Wp solar on the roof. Been running this system for almost a year and use them every day (as I live in my van). It has been freezing here last week. I was not worried and nothing happened. Other van dwellers around me had all kinds of issues with BMSs of LFP systems shutting off, AGM not performing to satisfaction, etc. Me, no problems at all except for no sunshine but that's normal here in winter time.

[@daan3298]

@@SystemsPlanet send me a message on Instagram or Facebook: @vankensteiner and I'll hook you up

[@daan3298]

@@SystemsPlanet it was me, still like it

[@FrancisdeBriey]

I would tend to believe that plenty of resellers label B cells as A cells, or even just lie about the effective reel capacity of A cells to sell them.

[@loucinci3922]

I don't like the format of LTO cells. Not much use for chemistry in South Florida. Thanks for sharing.

[@Wingnut353]

They make them in regular square cells also.

[@thesurvivalist.]

Buying from China only seems to get worse over the years, I had to get EBay involved last week, because they did not send the items that I purchased, yet they kept telling me to give them more time, they were trying to get me to surpass the 30 day limit!

[@NateHarrisCreations]

Can you make a video on how set up and do a capacity test using a CBA4

[@elpatoflipao8188]

If I buy 6 YINLONG batteries and join them in series to get about 15 volts with an S6 balancer, if I put a charger that gives 15 volts and 160 amps could I charge this kind of lithium battery??

[@xrpbelieverxrpbeliever5093]

Yes I love your videos makes my day at work

[@trevortrevortsr2]

Wow cheers Will was thinking of getting 16 for the RV - Back to Lifepo4 now

[@harlancampbell]

Shoot. I really wanted them to work. Thanks for saving all of us the disappointment!!!!

[@AbidHussain-sq2mt]

Finally I did not understand which cell should I buy for my solar setup.😯 Ying ling titanate or lifepo4.

[@djuban1]

I ordered a battle born 12v 100 amp hour lithium battery. I got the blue smart IP65 12/15 charger. I hope that will charge it. I'm new to this. Thank you for great videos.

[@BriTube007]

Looks like a great application would be a van with a big alternator that is set up to use for downhill skiing, which is what I am working on at the moment. Cold temps, very high charge rates so you don't have to run the van for hours when charging. Frequent start and stop cycles when touring around etc. And thoughts on why there are so many B cells out there? Honda, Mitsubishi, bus manufacturers etc use piles of these cells. If any cells don't meet their stringent specs they hit the B market I expect.

[@pixiepaws99]

If you're going to wait until charge current is 0, then it doesn't matter where you place the charge clips, because they'll be charged equally when current is 0.

[@GillyGuy]

What about using a 6s battery for a starting battery in a car? With the alternator voltage well below the max voltage of the cell, using a 6s without a bms seems like a decent alternative. At least as a project. Am I missing something that would not make them ideal for that? I can forsee having to check the balance occasionally, but the voltage range they would "live" in would not put them in danger.

[@WillProwse]

Yes! I planned to mention that in my notes. That would be a great application for this chemistry. Your logic with voltage of charging system of ice vehicle is true. It works great

[@GillyGuy]

@@WillProwse and I would imagine that cold weather would not affect the cranking amps as much as it does lead acid (from mn so the cold is a big deal) looking forward to the freezing temp discharge tests when you get grade a cells

[@JoniK1]

I've had them for a year without balancer, no problems so far. Now I increased charging voltage to 15.6V, we will see how it goes 😃

[@Craig_Parsons]

@@JoniK1 you will be fine at 2.6v per cell. And there is so little energy above 2.5v per cell that there is no need to go higher. In facr I would never recommend charging over 2.6 per cell. The only thing that can hurt these is overcharging.

[@pianocontortions7038]

I just bought a "40Ah" 5s pack to try in a car (the idea being to avoid a battery heater for winter, and reduce weight compared to a Pb battery). The voltage is a little low, but the reduced voltage sag under cranking should make it at least no worse than lead acid. With OEM sized lead acid, I find you get ~12.4V at best with a full battery, ignition + lights switched on, and less if the battery isn't brand new. As long as the open circuit voltage is over 11V, I think 40Ah LTO should be able to crank most engines out there. Though the highest you're supposed to charge an LTO cell is 2.85V (14.25V in a 5S), research literature seems to suggest permanent damage only occurs above 3V, and most cars won't produce more than 14.7V under any circumstance (the exception being some newer German cars), so 5S should be safe, IMO.

[@stewartrv]

It seems to me that this chemistry is perfect for vehicles and maybe phones/laptops where safety, fast (dis)charge and temperatures are very useful features. Using them in a building not so much...

[@magiricod]

phones and laptops need to be small and light therefore it isn't a good idea.

[@stewartrv]

@@magiricod The batteries for phones and laptops can be made using this chemistry just as well. They won't be larger or heavier. I said Chemistry not these specific cells tested - that would be ridiculous of course. What are you basing you opinion on? If you have seen research somewhere that I don't know of that disputes it please share it!

[@magiricod]

@@stewartrv I mean look at the energy density of it. It's abysmal. Only good for large applications like vehicles and stationary applications

[@stewartrv]

@@magiricod I was under the impression it was only a bit worse than normal Lithium-Ion (due to lower inherent voltage mainly), but I see your point, now I looked at that parameter :)

[@herbertwerner2287]

Interesting video Will. Sad to see the batteries not pan out like they should have. Would have liked to have seen that cold temp test but as you said why bother with grade B batteries. There are things to learn here thanks for the video.

[@92naza]

LTO cells brand from Lishen got a lot of good review and previously im using for my car audio setup...surprising for my 36ah 6s2p setup can support up to 8000 watts rms++ with just 150a alternator 15v system and get total around 820a burst power test.The cells rating can up to 25c current discharged.

[@maggiesjourney3877]

Outland Solar had an advertisement on your page. Never heard of it, but it was an awesome commercial. Lol.

[@SteveWrightNZ]

For full-current use, remove stickers and attach balance cabling with their own smaller screws - do not put the balance cabling under the terminal

[@matthewmassey2333]

You did not buy grade B cells. You bought 40AH grade A cells and they are among the most common being used in high power car audio because of the 10c charge/discharge. And do very very well. Evidence of this you can visit XS Powers website they have the rewrapped cells 35ah/40ah

[@gravelydon7072]

If you think that the rating on them is bad, you should see them on some USA made capacitors. 6,300µF at 400VDC -10% to +50%. So in reality they are 5670 to 9450µF capacitors. You just don't know what until you test them. Newer ones are -20% to +20% which is still a 40% swing possibility.

[@Infinion]

Please define what you mean by grade A, grade B, grade C. What is the criteria? How did these cells compare against the previous LTO pack you tested?

[@OrionHCCC26]

Those are what you would call "re-wraps" I've bought a huge amount of these cells over the years for my own projects. The chinese market for these is a little messed up. I've found the most success with making sure I've got a Yinlong authorized re-distributer. Most of them are not. So most you find are re wraps and "re-stud" cells, which is where they weld on new end studs. I've actually had better cells with re studs but they have a tiny bit more internal resistance.

[@deadlinkofficialartst5592]

and not only did these cells not come with bus bars but they did not come with These Nuts Ha Got Him Nice

[@Sezaa]

Thanks, good video but maybe you need think about ohm law. 12 volt/1 ohm= 12 amper This mean you need put more small ohm or need make serial connection with other grade b cells for more big voltage(also mean for big amper more easy). I guess this will fix your problem :)

[@mrcooleh]

Thanks for the test will. Well done

[@dumitrymd5557]

Bls is is producer and is very trusted one

[@ROTTBOXX]

How did you acquire these? I thought Alibaba didnt sell to the general consumer

[@inachu]

learning more about batteries :-)

[@jamest.5001]

Car audio, and maybe car starting battery replacement maybe? In cars or emergency vehicles that need a somewhat deeper cycle starting battery, that have accessories that are used while the engine is not running, I guess the LTO would be really suited for portable tools, like welders, large saws, things that require high power and cycled, with a pack of these, a portable welder could perform well!

[@moderngunguy3666]

nope people use it for a 12-volt applications the most like I said it's for car audio

[@dannymorgan9258]

I've seen a high peak in yin long cells in the car audio seen... I'm currently running xs power yin long 40ah bank in my daily vehicle

[@worlukk]

excellent video. superb explanations.

[@MichaelBeeny]

My experience with Chinese sellers on eBay and others, mostly in the audio and power supply area is overall, power output is almost always way less than advertised. Safety is none existent. They are quite happy to sell you stuff that will blow up or even kill you. Very little is inspected or tested. Can take months to get the goods, about 40% of items NEVER arrive or are damaged due to poor packing. We know it's going to be crap but we still keep buying! On my channel I always expose such retailers and products, very pleased you do also, it's the only way they will learn. If a retailer gets a bad rating, they just change the name of the shop and continue to trade in the same way.

[@TheAHYZ]

I have recently bought some decent 5Ah 21700 li-ion batteries on Aliexpress for ebike 10s-4p configuration. I am super happy with the price, the real capacity of the individual cell is about 4.8Ah and the bike's BMS is used for protection. The bike's BMS with default settings uses little over 600 Wh out of 'stated' 720 Ah, which is perfectly fine, considering I have upgraded from faulty 360 Wh pack.

[@vickyhuang2305]

I think you ordered these cells which is B grade 40 Ah .most of TLO cell is B grade. A grade is used for big electric car ,if use for caraudio or solar system.B grade is great(B grade price is half of A grade).Most of Yinlong distributors in China are honest.

[@dyslectische]

I think about is . And yes boat is the way to use is. The Electro engine will pul a lot off power. And its can handelt the cold . So boats what go to cold places will be a great way. Speciale the boat have a long use for it go to a junkjart. Boat are beult arround an engine. You can not thake a engibe oud. So for Electro boats well it can be use. With combo solar and wind charging

[@frankligas2249]

Thanks for the video. You say this chemistry is good for Antarctica, but how about Mars? What would you recommend for a Mars solar station?

[@burtonnystrom4606]

Great testing will happy holidays 😎😎😎

[@sspence65]

I lived off-grid for 10 years. a 10C discharge rate is very advantageous when a heavy load (well pump, heat pump compressor, welder) kicks in as you don't brown out your other loads. These are great cells for solar off gridders.