ExpertPower 4 Pack 3.2V 304Ah LiFePO4 Lithium Battery Cell | UL2580 A+ Grade 4000-7000 Life Cycles & 10-Year LifeSpan | Deep Cycle Rechargeable & Electric-Vehicle Grade

These have been great so far. It took a while for me to put them in production because I was waiting for a new version of my preferred BMS to reach a stable release status. I charged them individually when received and again before assembling my battery.You can see from the picture they are very well matched.

I purchase 24 cells , They all came in great shape No dings, all tested above there amp hr rating. I put together 3 packs of 8 for 24 volt system, with 3- 200 amp JK BMS's awesome set up. I had 6 Battle Born 100 amp hr. @ $6,000 Had balance problems for 300 amp hrs. Now I have 912+ amp hrs. @ 24 volts for HALF the price. Been working great for 7 month, so we will see in the long run. So far no problem.

I built my Couch batteries for my RV. After running 3 months - the results degraded by less than 1% with full of Charged. ( 301.2Ah instead of 304Ah). I gave 4 stars.

So far I am happy with the cells. Basic testing put them within 3% of rating and that may be from my testing methods and not the cells. They are not swelled like some I have purchased. They may cost more than others here, but I can see small things that are better than others I have purchased. Things like the covers aren't peeling at the edges, nice polarity indicators, same number of jumpers as cells, cases are not bowed etc. If there is something I would ask to change it would be the aluminum bus bars. Aluminum is about 60% as conductive as copper and these are fairly wide bus bars, but it just feels a little light duty to me. This minor concern did not prevent me from ordering another 16 cells. If I have any issues with these or the next batch that is currently in shipping I will update this.

Great packaging. Clean sparkly and new. Minor bubble defects in individual blue shrink wrap, but i dont consider that anything to complain about. Every single cell metered at 3.29v. I am pleased. Haven't done a capacity test yet, but I dont have a reason to believe they'd lay short.

Great value.

I have not real equipment for capacity testing but I rough idea with a killawatt meter. I pulled just shy of the rated output in 2 tests and also was over the rating in two other tests. All terminals and included screws and busbars was in good condition. Also 4 cells had the same voltage from the moment I got them. For the price you can't beat them. They seem on par with my 100ah amperetime battery.

These are the worst batteries I have ever bought in my life.This is the only review I have given, and I have NEVER felt so ripped off in my 52 years.Every single one has gone bad when they swell up twice their size.As a master electrician I have installed solar over 14 years now, and never experienced such a poor quality issue like I have with these.Of the 32 I purchased, only six have not blown up.I have ONLY used name brand controllers and BMS and they’ve NEVER been overcharged.DO NOT BUY THESE BATTERIES!!!!!What’s worse they’re too dangerous to keep around and definitely too dangerous to ship back for a refund.Amazon should be ashamed for even letting these be sold.