Buying And Testing Lifepo4. Big Cells For DIY Batteries!

[@Dutch_off_grid_homesteading]

Heya, 1 more batch of good batteries from Jenny Wu she's bilding a good rep. for her self

[@zebasd]

Great video thank you 👍

[@mysticwolf2842]

This is good info I will be getting in touch and finding out about getting a few.

[@robertallencad1]

Hello and good to see you and hear your review. I will be contacting JW. Thank you Sir from the Silicon Valley Piedmont Missouri. Go Team

[@matthewknight5641]

You are by far the best batrery builder ive seen on youtube or anywhere for that matter. Im in a race with time i feel having this cancer and getting a battery built that can support my off grid power system is a top priority. Im wanting my wife to have power without a power bill after im gone and even while im sick it would be nice. This solar stuff has given me a hobby that will hopefully benifit my family once im gone. Im currently using 24 nissan leaf modules but hopefully one day soon i can get some cells like you use in your battery builds. Id like a 20 or 30 kw pack so our off grid tiny home camper can make it thru a few days of bad weather. Thanks for the videos we all love seeing your stuff you do and the info you share

[@FutureSystem738]

Nice to see you back Ray, and G’day from Oz 🇦🇺

[@lotechgreg]

The LF304's were what I bought from Jenny a year ago, couldn't be happier with the cell purchase...

[@energydreamer5347]

Thanks for the share Ray - one day when I grow young man - maybe I can be like you! Good to see you back!

[@RobinHillier-v1e]

I'm enjoying watching your variety of videos. thank you for your postings. I am expecting delivery of a ZKETECH EBC-A40L and am expecting the typical horrible Chinglish manual. Would you consider a brief video of detailed step by step use of your tester? My cells should reach me soon and I must say, I'm a little nervous about the charge and test part of the battery build.

[@julianhorner4922]

The QR code is a good way to determine if the seller has been honest with you as you can determine manufacturer, and date of manufacture from it. I bought 16 cells from China guaranteed to be “brand new EVE cells” and according to the QR’s not a single one was even close to new and three cells were not EVE. I should have requested the QR’s of my purchase before releasing shipment and at least stood a chance of knowing ahead of time. That is if they sent me the actual QR’s of the batteries they were shipping. If they were different I would have had concrete reason to reject them under Alibaba protections. Ray could you PM me, I’m in the Houston area and building a sizable system for my cruising catamaran and would like to converse if you are willing. Thanks for your helpful work!

[@typxxilps]

You should have made the deal with jenny wu as most of us did after watching rays first video from new year 2022 I guess where he started to share his experiences. And do not trust the qr codes send to you as photos cause that is no guarantee that you would get these cells. The sellers do know what you are looking for and why you are asking therefore would be able to fool you . Avoid the hazzle and risks and buy from jenny wu as Ray has said multiple times. Works quite nicely and if you still do not trust you still have the paypal protection if you buy from docan power. Our cells arrived within 4,5 weeks from china in europe delivered to our door with all the taxes and duties paid at purchase so no delays nor hazzles. Average cell had delivered about 1% than nominal and promised. I had purchased EvE cells grade B which I had asked for and I got those with genuine QR code you can no longer read, but the manufacturer is also laser engraving the serial number you would get from the qr code so you are able to check the qr code by entereing the serial. Worked great, all cells are about a year old and still running above 101% of nominal capacity. They are used with a seplos bms and connected with a growatt SPH family hybrid inverter.

[@hrenes]

Ray says cool stuff!

[@jasonbroom7147]

So, if space is a concern, go with the larger 300+ AH batteries. If the absolute lowest cost is what you want, the 280's are still a slightly better value? Regardless of where you got those cells, they are certainly testing as A-Grade.

[@ciciedee5474]

QR codes are the same thing as certificate of authenticity. It means nothing. If the cells test okay, then they are ok. If I am spending 30k, I will be taking care of my investment. I have the ability to follow directions. I will compress the cells. I will read the part that says once the cells have expanded, they are expanded. I will read the part that says the expansion takes place once the cells are charged above 3.25 volts. I watched a KZbin'r take apart a Nissan battery pack and couldn't get the bolts back in because they were too short. The battery expanded when he took it apart. Another great video Ray

[@typxxilps]

Nissan leaf is a different thing and has nothing in common with what ray is sharing: LFP chemistry They have been already charged fully once the arrived at your door cause the dealers claim to charge and discharge them especially those that had been sold as grade B cells. So compression is great to avoid risks caused by too high loads but it has not to be soo tight if you read what EVE has written in their big manual / spec sheet how to use these cells.

[@msxdroid]

He Ray, In your last video you have put the email from Jenny Wu. I have contacted her and I have bought 4 times 280ah lifepo4 batteries. Still waiting on delivering. But she has answered all my questions as good as she could. Also I have explained to her that I got her email address from you. Just to let you know, waiting for batteries now and she how they are. Nice video’s by the way, kind regards

[@chrisstephens9948]

What was your cost?

[@msxdroid]

@@chrisstephens9948 if I am correct, around 460 dollars, including shipping and payment fee, but prices may vary. I am in the EU.

[@RobinHillier-v1e]

I really appreciate your videos as a source of good info on building Lifepo4 batteries. My design skills are rusty as college was 45 years ago and my electronics employment was limited to trouble shooting of mainframe gear for IBM, which required good analytical skills, but not down at ohm's law level. You are helping me to gather the confidence to build some batteries for an RV. Health problems and finances are forcing me into a life of fulltime .boondocking, a roof covered in solar panels, and DIY batteries. Thank you

[@RayBuildsCoolStuff]

Good luck sir.

[@Cptnbond]

Hi Ray. I understand that discharge the batteries down to 2.5 volt for the capacity test. However, for the day-to-day use, it might not be a good idea for maximizing the life of the batteries. What voltage do you recommend stopping discharging them in this case? Cheers.

[@RayBuildsCoolStuff]

3.0v

[@thomasmott619]

Some may disagree but 3.5 to 3.0 has been my range of choice. It also keeps the math simple.

[@gubbernl]

Hi Ray, Always nice to whats you channel. What is the going rate these days for cells from her?

[@RayBuildsCoolStuff]

something like 110 usd plus shipping but I'm not the right person to ask. Jenny can answer your question and she loves to work.

[@luclavallee8946]

I also bought from her . From her china store ...great great great product honesty is her policy

[@JOHNG104A]

Does ali express have hidden costs to the us besides shipping cost?

[@MistaTerps]

My understanding is that you get can more cycles out of the 280ah (please don’t ask me to back that up with any actual science) it was just what I picked up when I was purchasing cells from Docan Technology & obviously had the option of the 304ah.

[@450kman]

Your thoughts on top balancing with the new 2amp and 5amp active balancers ...

[@RayBuildsCoolStuff]

I haven’t used them and I haven’t needed them. They seem heavy handed and inefficient. I might pursue them if I had poor quality cells but I would feel like I was chasing my tail at that point. Now that I’ve said that, remember that the first thing I said is that I haven’t used them so to avoid arrogance I will stress that point.

[@CET675]

Hello, you felon! I mean, fellow (inside joke from a previous video) GOOD TO SEE YOU

[@Sanwizard1]

That tester has become the defacto standard for LiFePo4 testing. I first saw it on Andy's channel, so I bought it also. The price will be increasing due to demand. As usual, nice work!

[@typxxilps]

no, the demand is no longer increasing at least here cause it had become harder to sell them used. And: lot less sales of diy batteries since ready to use rack batteries arrived here with BYD LFP cells and domestic seller and warranty. 10 kWh for 2500€ is a bargain considering that a metal case and seplos bms or similiar are not cheap. 2500€ for a door to door delivery with a domestic warranty and BYD cells is a great deal cause the cells alone for a 8,4 kWh LFP were about 1300€. Add 25% and then you are close to 1600€ plus box plus bms which can be about 900€. Also the sales of diy cells had been stalling for quite a longer period cause Will Prowse had complained about a year ago or so. And he can track those figures due to affiliate links sales and results, that people might watched his videos but sales had gone down. And he also asked US retailers he has been working with. The testers are usually needed only once and far too expensive to let them in the shop if you can only charge and test cells but not the big battery unless you build 1 battery a year or so. I bought them new, used them and sold them again and therefore I know that it had become tougher to sell those tester again. Once I finished a battery I tend to think that I would not build one again, but then a year later or too I have a need for a bigger battery due to new demand caused by replacing the central gas heating with heat pump systems. Before I had build one without having in mind that a bigger one could be better for the EV too and so I have build additional batteries to meet my needs over time. Now there are 3 of these.

[@PhilippeCJR]

I see another QR code under the black foil.... top left side...

[@RayBuildsCoolStuff]

It's some type of code but smaller and not really a QR code. Not sure what that is and I've never seen one that looked like that or placed there on any other cell.

[@stevespawn1]

How much does this 14kwh battery you built cost?

[@RayBuildsCoolStuff]

Bach then the total cost was 2,800$. With the new cells that I just posted a video about you can build a 17 KWh battery for a little less than that.

[@ursodermatt8809]

when are you going to hook up the batteries and inverters in your power shed?

[@RayBuildsCoolStuff]

almost there

[@peterking1134]

Welcome back

[@RayBuildsCoolStuff]

First comment! Thanks

[@mikejf4377]

You did say 304 instead of 280, what was your average on them during your test cycle? Are they the same dimensions as the 280 batteries? Nice Video.

[@RayBuildsCoolStuff]

They are the same dimensions. The average was 312.1 AH

[@doktorkot1817]

all cells from the company EWE or CATL are sold in China have not passed the standards of the factory and are sold to the market Alibaba, Ali.honest sellers inform with this are Class B but few sellers know about it because their employers do not inform, the cell in the factory EWE class A costs LF304ah 180USD and intermediaries the same cells as did not pass the standards buy like class A for 112usd lf304

[@typxxilps]

I do not know what you are talking about cause in europe you can get eve cells grade A from EvE distributors but for a different price. And all other non grade A cells have been marked by EVE as B which is engraved by them over the qr code so that his is no longer readable, but the serial is still there and can be checked with the usual qr code tools too.

[@martinseagate1115]

Hi I only just started watching you and I know and I know it's already probably been asked but what and asked but what is the material you put between the cells

[@RayBuildsCoolStuff]

Thin cutting board material from arrow home products from Amazon

[@philorton1940]

Ray, just an FYI, I ordered my second group of 16 cells from Jenny, from the Houston stock, on 4/26pm and received them 5/1 at noon. Ordered the first batch the middle of last year and had the same delivery and service. Thanks again for finding her and referring her to us. Takes the stress out of making purchases that cost this much and delivery times from China!

[@avarora]

How did you order it? emailed her or used a website?

[@Oldguydoingthings]

@@avarora started with email and when we agreed on purchase she sent me an invoice and I paid it. I pay using paypal for another layer of protection. No issues with my 2 orders.

[@cameronmackenzie3722]

I am interested in your results. Was your lastest batch just these 4 cells? Do you think 6.8ah difference between the 4 cells is acceptable in a batch?

[@RayBuildsCoolStuff]

I would prefer they all be the same but they all tested well above the rating and I think they will perform well. Yes, I just ordered these four cells this time.

[@typxxilps]

He had gotten what he had paid for and do never forget what will happen with a batch of 16 cells. That cell with the lowest capacity will determine the capacity of the whole package cause this will be the cell that runs first into the low voltage alarm and stops the battery just to protect that single cell. Everything above the lowest is lost - except you buy 64 cells and put the best of the best into the first battery and so on cause then you can benefit from putting the best of the best together and all cells of these 4 batteries would be much closer together than a battery build just out of 16 cells and no choice.

[@patrickmckowen2999]

Thank you Ray 👍

[@Mike-01234]

I noticed other solar KZbin channels have been pushing expensive server rack batteries with affiliate links saying DIY battery cells are grade B at best should avoid them. When you price out the difference it's almost 1/2 the cost when you put in 300 AH batteries. 100AH it's closer to buying server rack if you look at the BMS cost difference might as well go with the higher current.

[@RayBuildsCoolStuff]

It’s kind of funny that they would say that they’re a grade A when they’re definitely not EV vehicle grade cells and the manufacturers don’t have a grade A. They have EV certified and not. So what you get with the server rack battery is who knows in the way of battery cells, and very difficult or impossible to test what you have except for the capacity of the entire battery. In the end, it comes down to dollars per kilowatt hour. I will say that if you were trying to market a product, it is easier to promote a ready-made battery instead of helping people put their own together.

[@Mike-01234]

@@RayBuildsCoolStuffThat makes sense I understand people who have the money to spend why not just buy an EG-4 rack that is done and has a 10-year warranty. I don't have that kind of money. My goal is to investigate if it's feasible to build a DIY system to take my 5000W AC unit to battery during peak usage and cost between the hours of 4pm-7pm. If I can remove biggest load and charge the batteries during off peak the ROI might workout with DIY cell batteries.

[@JOHNG104A]

Are there any hidden costs to the us other than shipping costs?

[@RayBuildsCoolStuff]

Alibaba fees

[@RobinHillier-v1e]

Hello Ray; I'm newly subscribed now that I was able to get my KZbin id recovered, hoping to add a few micropennies to your channel. I told Jenny Wu that I found Docan Power because of you. I can order my EVE LF280K cells with 2 threaded posts or 4 threaded holes. I was thinking that the 4 bolts on each busbar would give better conduction? I own thread chasers and know how to use a torque wrench so I'm not afraid of stripping threads. I saw a fairly recent post of multiple welded posts popping off the battery ( the whole aluminium plate and post comes free) so that scares me. I have read "opinions" but no offical stated torque values for bolt tightening. I sent an email directly to EVE, but no response so far. I will ask Jenny. I would love to hear your thoughts on these topics. Thanks, Robin

[@RayBuildsCoolStuff]

I torque temporary connections to 4nm and permanent connections to 5 or 6 nm. I think a good limit is 8nm and I wouldn't go there personally. I use the serrated nuts. I have yet to find a connection that has loosened up later but I'm not convinced it can't happen.

[@typxxilps]

you usually can find the torque limit in the pdf spec sheet from eve for such cell poles. Ask Jenny Wu if she had not send these to you. These are documents over 16 - 25 pages long with a lot of details and things you do not know . They also tell you about the version you are getting cause they = EVE are constantly improving those cells that are still sold as LF280K but with a counter which you can see only in that document which typ of LF280K you should get. Usually these torque figures are quite low so do not use too much cause you would damage the connection of the battery pole / terminal inside the battery and then you are screwed cause it will get loose then and no way to fix it.

[@RobinHillier-v1e]

@@typxxilps Thanks for the reply. I did find the spec sheets and printed them off. It states 6 nm as maximum torque on the bolts.

[@MacMcCabe2456]

I'd like to build a 36 Volt battery pack to power my 36 Volt EZGO Golf cart which uses six 6 Volt Trojan lead acid batteries at the moment. I was wondering if you may have any input as to what I may need to accomplish this ? Thank you. Great videos !

[@avarora]

Great video. Where do you buy your bms?

[@RayBuildsCoolStuff]

Which ones?

[@avarora]

@@RayBuildsCoolStuff for 48 v battery that you build. Also need for 24 v

[@matthewknight5641]

Ray feel free to donate me 30 kw of batteries all put together in a 24 volt pack. Have it delivered to my house and I'll be putting it to good use... lol. Really tho I'd love to have a 20 or 30 kw battery from you. How much would it cost me???

[@RayBuildsCoolStuff]

I appreciate your faith in me. Every time I build something or design something or do something someone tells me that it’s something I could make a living at. Unfortunately there’s only me and I spend a lot of my time doing things that are important to me but don’t involve making a living. Life is too short so I just build things that I need and try to teach others how to do the same along the way.

[@matthewknight5641]

@@RayBuildsCoolStuff I've learned a lot from your videos. I'm an over the road truck driver and I'm only home a couple days a month if that. When I'm home I'm steady trying to get my solar power system together for our camper that we stay in when not in the semi truck. I'm using 24 leaf modules at the moment and they seem to be doing fine but they don't have a bms. Some people say the leaf batteries are dangerous but so far so good. Hopefully in the near future I can order about 20 kw or so of lifepo4 cells and get a good bms for them. I ordered a 38 seer minisplit that I have to install when I get home this time but then it's time for a battery. The wife and I both love the work you do and we both thankyou for the service you provide by doing the videos

[@RayBuildsCoolStuff]

@@matthewknight5641 thank you so much, sir. Thank you also for your service to our country as a truck driver. You have one of the most difficult and thankless jobs out there and you and you have earned my respect by doing it.

[@typxxilps]

30 kWh cells are sold for 6000€ if you get EVE LF280K here - or 3 batteries in a metall rack case each 2500€ so 7500€ in total. Not so much to safe if you consider that a SEPLOS BMS is a bout 250€ each, so just 1000€ as budget for those 2 cases, wiring, terminals or anderson connectors. I guess we had about 400€ for each battery on top of the cells for case and BMS but do not forget that the ZKE Tech Tester is about 250€ alone, an internal resistand meter 50€ , you will need a hydraulic crimping tool for the lugs and what not which will add all up a lot if you are not selling them afterwards instantly. So 500€ for 2 seplos BMS, 300€ for 2 cases, rods , cables, lugs, and then 350€ for tools, so 1150€ on top of the 6000€ for cells. Pretty close to 3 new domestic batteries in metal with a domestic 5 year warranty that you can get for just 7500€ - 4% cashback right now. And then it is a 7150€ to 7200€ race and a lot of work and hours to get it done. Also these rack batteries or Powerwalls of 10 kWh have BYD cells. If you love to diy then the choice is obvious if you can afford or rent the tools needed other wise I would buy one from Berlin.

[@massa-blasta]

what are those cylinders behind you?

[@RayBuildsCoolStuff]

High pressure tanks containing 32% oxygen for scuba diving.

[@asiasmells71]

Haha I asked the same question while back

[@massa-blasta]

@@asiasmells71 I figured it was Cryogenics and he was planning to keep his brain in there or something.

[@RJ-cc1fz]

I contacted jennyWu thru email when I got my cells last October. They are CATL cells because eve was sold out at that time. They do have a scratched off QR code under the black top. They also have new painted on QR code. I asked her about this. She said that they get them from their supplier and cannot keep the original QR code. She also said the new QR code is the right one. Whatever that means. Regardless the cells tested at full capacity, stay well balanced and have not expanded and are serving me well. Glad your back making videos! You lucky dog with those splitphase Deyes.. Really wish I would have jumped on one of those but I wasn’t quite ready..

[@repairman2be250]

Is that what you ordered from Jenny Wu? I mean did you order EVE cells and they just sent you CATL ones without asking you first if you OK with that?

[@energydreamer5347]

I am right behind you on the Deyes Inverter comment.

[@pr5991]

I orders EVE280 but they sent me EVE304, ordered another 4 cells of EVE304 and waiting, hope they don’t send me 280ah instead.

[@RJ-cc1fz]

@@repairman2be250 I was told eve was out of stock before I placed the order for CATL

[@repairman2be250]

@@RJ-cc1fz OK, thanks.

[@jalpa9642]

Ray.... I was wondering if you have ever done any business with "Battery Hookup" out of CA. ...? They have some Li-Ion or LiPo4 batt.'s 3.2 volt, 105 Ah, Lifepo4 Prismatic type.... Salvaged from modules that had bad Laser welds of Aluminum Tabs..? $40.00 each...? And how would one repair or place such Aluminum Tabs...? Like... with terminal Posts..? =)

[@RayBuildsCoolStuff]

I have not.

[@ProLS6]

What do you torque the compression rods too?

[@RayBuildsCoolStuff]

1nm

[@PhilippeCJR]

@@RayBuildsCoolStuff 1Nm is not that much, it is matching the 300KG force that is specified for the compression on the cells?

[@RayBuildsCoolStuff]

@@PhilippeCJR by my calculations it is a little less than the recommended rate.

[@pasichnyk]

I bought some LF304 cells from the same supplier (via email) and the cells were indeed re-etched as was mentioned. I’m assuming to his the EVE “B” marking, but I have no idea now how old the cells actually are as I can’t trust the QR code date codes…

[@9111logic]

Thanks Ray, Jenny quoted me for the 304A batteries a few months ago and as soon as I have the all systems running I shall proceed to purchase 16. BTW, I was wondering if the Seplos S16 200 will still be adequate for a battery of such a capacity 🤔

[@RayBuildsCoolStuff]

Yes but the calculation for the BMS is related to the load, not the battery capacity. Does that make sense?

[@9111logic]

@@RayBuildsCoolStuff Yes thank you, that makes sense indeed, I was worried as I'm about to order both the BMS and a set of 16 304A cells from Jenny and start building the storage unit.

[@RobinHillier-w5u]

Hello Ray: When I go searching to buy 3.65 volt eve cells, I'm seeing a lot of 3.2 volt, with a notation of "safe volt range" of 2.5 to 3.65 volts. Is that a 3.65 volt cell? Thanks for your earlier reply and good wishes.

[@RayBuildsCoolStuff]

Yes that is correct

[@typxxilps]

nominal ratings for lfp are all the same about 3.20 V and sometimes 3.19 V Everything else you mention are the usual cut off voltage when charging or discharging or in particualr the points where to stop charging and discharging.

[@bwuepper439]

I have watched some of your videos on making batteries from the cells. I cant remember hearing the price you pay for the cells. The reason I ask is more for trying to analyze the overall cost of a home built battery. I am mostly in the research phase at the moment but even a rough price for the cell would allow me to calculate and compare home built to a commercial battery. Thanks for your videos.

[@RobinHillier-w5u]

Hello Ray: I'm interested in hearing your opinion on the cycle life quoted for the EVE LF280K (6000) vs the LF304 (3500). I've been quoted by Jenny Wu a price 28% more for the 304 than the 280 although the added capacity is only 9%, that coupled with the estimated longer life makes the 280 seem like a better bang for the buck. Any thoughts?

[@RayBuildsCoolStuff]

I’ve been happy with the 280s and the 304s rested really well but if it is 28% more then I would go for the 280s. I don’t think cycle life is likely to be an issue for most people.

[@avarora]

What was your price for the 280? Want to buy too

[@RayBuildsCoolStuff]

@@avarora prices are dropping. Contact Jenny for current pricing.

[@RobinHillier-v1e]

@@avarora I just placed my order today, June 19/23 and The price is $90 US plus Alibaba fees and shipping

[@MyGoogleYoutube]

What kind of delta were you seeing when the cells were at 3.65?

[@typxxilps]

there is no delta in the voltage cause the zke tech tester will slowly increase the voltage while lowering the Amps till it hits 3,65V and then cut off. What else do you expect after having charged to 3,65 V? If you let them rest for a month then you will see weaker cells with lower voltage but not right after charging.

[@MyGoogleYoutube]

@@typxxilps So you're saying you're observing zero mV between all cells at 3.65?

[@ascotthortersqu6622]

I ordered 36 cells from Yenny Wu last year. The handling, support and communication were very good. But unfortunately the cells weren't all okay. Roughly speaking, one third of the 36 cells reached just over 270 Ah, another third approx. 275 Ah and one third 280 Ah. The German community is also not only reporting good things about Jenny Wu/Docan in terms of capacity. You have to assume that - as is so often the case - you won't get an A grade after all. Incidentally, I don't think this is absolutely necessary for the usual home storage application. If you do a clean top balancing and let the cells work in the safe operation range, everything is actually fine. It seems to me that it is more important than the few Ah more or less that you are always well informed about the status of the delivery. And that you get a quick answer to questions.

[@Foxfried]

There is a thread on DIY solarforum under the vendor review, you can see how Ray is not telling the truth about the QR code a user post a screenshot showing you how the qr code has been altered from original.

[@RayBuildsCoolStuff]

@@Foxfried this makes no sense to me. I showed the QR codes and they don’t look like the altered codes I have seen. I gave a bad review to SFK when I got a set of cells that didn’t measure close to the numbers in their hand written test report that came with the cells. Now there is a thread where a fan of SFK is insulting me. OK I get that but I don’t understand how you think I’ve misrepresented anything. Disagreeing with my assessment is fine but calling me a liar is not.

[@RayBuildsCoolStuff]

Hi Ascott How did Jenny handle your problem?

[@ascotthortersqu6622]

@@RayBuildsCoolStuff She wrote: Anyway, I still feel sorry for your testing result. If possible, let me apply for a small refund like 50USD for compensation, or use it for your next order ? Sorry again.

[@typxxilps]

I am from germany and gotten quite good cells each over delivering. What the germans did not really get right is the testing procedures and conditions EVE is mentioning in the papers like 25° C ambient temperature. Most of them did not have read those papers or looked for such high temperatures but I did and I also observed that the cells capacity increased cause I checked the lower half of my 16 cells over 100 times before I built the battery. At the end the capacity increased and now 75% of those 16 cells are above 1,5% of nominal capacity measured in Ah even though i do not care about Ah, but Wh cause that is what does matter. And the rate in Wh is even higher than +1,5% Ah cause energy results out of current x voltage over time.

[@onthelake9554]

The chinese cracker charger .

[@theoffgridtravelers7316]

Did you test the resistance of each cell?

[@RayBuildsCoolStuff]

yes, they tested at .31, .28, .26 and .19 mohms respectively.

[@theoffgridtravelers7316]

@@RayBuildsCoolStuff Thank you

[@cods41]

You started off well Ray, but I haven't heard a video from you in a long time that hasn't been a blatant advertisement. Go back to telling us about your system and building batteries etc. And try to do it without mentioning any battery sellers.

[@typxxilps]

Not really advertisement. I had gotten mine from Jenny Wu and she delivered cells that delivered more than they were rated. Quite good considering 1,5% more is not nothing. And it took ages till Ray mentioned the seller and how to get such cells for the first time while viewers were constantly asking for the seller and how to get these. Read the comments under the first videos about battery cells from new years day 2022 onward and then you know who had asked for that. We - maybe not you. But do not blame him for what the viewers had been asking for and he reluctantly revealed.

[@chuxxsss]

Morning Ray, is it warming up over there? Starting to cool down here in Australia.

[@RayBuildsCoolStuff]

Still pleasant. I could use some more rain. lol

[@chuxxsss]

@Ray Builds Cool Stuff We are getting a lot of your rain here. Normally, a lot dryer here.