LiFePO4 Cells 3.2V 54Ah 4pcs Battery Rechargeable Lithium Iron Phosphate,Max.Continuous Discharge/Charge 50A, Support Multiple Series or Parallel DIY Battery Pack with busbars and Nuts

The nice thing about these cells is being able to get them without waiting for a ship to arrive. I got them in around a week. The cells are very carefully packed in robust foam, with inches of protection on all sides, and between the cells. They were all reasonably well balanced, and remain so in service on a JK BMS with active balancing. All in, this route is more expensive than purchasing a 50 Ah battery, but for my situation, it has advantages. 1. I get some experience with a seller. 2. I get some experience with EVE cells. 3. I learn with a modest investment, before moving on to a bigger project (RV solar).

EDIT Sept 15th 2025: Not long after my initial rating, I 'killed' the battery pack.... accidentally left it running my rock tumbler overnight when the pack voltage was below 12.4V, & resulting pack voltage was 0.00V in the morning. I was able to recover the batteries with my charger. I 'killed' the pack one more time about 2 month later & recovered again. SInce then it has been running a rock tumbler almost non-stop. in that timeframe these cells have managed to maintain incredibly tight voltage variance of +/- 0.006V on my Klein MM720 multi-meter, and still charge up to a little over 50,000mAh from 11.2V. Well worth the $$$ IMO. [end edit]I bought these before they had any ratings, which I don't normally do, but thought I'd take the chance based on price per amp hour....I'm running these in 4S with the included buss bars to power a DC motor that runs my rock tumbler. I'm also using a voltage controller to control the voltage going to the motor thereby adjusting the RPM's of the tumbler.This battery setup will run my tumbler for about 9 days or very close to 216 hours, which leaves the battery pack at about 11.2V - while 10V would be considered fully drained. From 11.2V my charger shows just a little over 51Ah pack capacity!Been using this battery pack for this purpose for about 4months continuously now, and have no issues. Even without a BMS, the batteries keep within 0.002V of each other throughout the discharge cycle.I now finally have a BMS, solar panel & solar charge controller to finally put this whole project together. And hope that this will continue to power my rock tumbler for years to come.

Good

I just ordered these and I was a bit skeptical because the headline says 32AH but the body of the description says 25AH. Regardless, I received them today and discharged them so that I could do a capacity check. 5 hours into a charge at a 4 amp rate and so far, inbound amperage is just starting to decline on the charger and the capacities are all in the 22k mAh range. Assuming these will still charge for a few more hours at this rate and the final capacity will land somewhere inbetween the 25 and 32 AH range which is acceptable.Update: Added a picture of the charge curves after completion. Need to add 1700mAh to Channel B because I restarted the charge. Whomever commented and said these aren't 32AH doesn't know how to charge a battery properly. In my experience, they are 32AH+The batteries themselves came beautifully packed in a box with a custom foam insert. While the price isn't as cheap as I would like - so far I am very happy with the purchase.

These things barely made it a year. Every pack is swollen.

So far so good. Bought three sets of 4 batteries each. Shipping foe the last set was delayed by a couple of weeks due to availability.I assembled each 12V battery with a BMS and tested @ 25 Amp Discharge rate and ended with a 11.1 Volts at BMS(-) and Battery (+) terminal.The lowest tested at 288AH the highest at 292AH. There are many variables that could account for the slightly low test, so I am assuming that I undercharged by a bit, stopped the test at too high a voltage or my equipment is not accurate enough. One cell was slightly fatter than the others otherwise the physical condition was good. I haven't put them into service yet, so I will update later if I find anything noteworthy.My Application:Marine Inverter application 3KW Inverter (Freedom SW3012) with 150Amp ChargerConfigured cells as 3 parallel at 12V(4 Cells)Daly 200 Amp BMS with parallel module.Update 5-2023:I installed a 200Amp breaker/switch on each battery in order to be able to isolate problems on the fly and to enable troubleshooting/testing. I reprogrammed the inverter/charger for this battery/BMS combination. The inverter charges at 150 amps with no problems with 2 or 3 batteries in parallel, but with one battery it becomes unstable and the inverter/charger trips with an "over voltage" error message. If anyone has any ideas on this please let me know. So I have one cycle on the installed system and am ready to try it out for real. I will update if I learn anything new.UPDATE 3-8-2024: One cell failed down to 2.4Volts, others on the same BMS were 3.2Volts. This is frustrating since this vendor does not sell single cells. I know it is not advisable to use cells of different ages; but $600 because one cell failed?

What a piece of packaged energy ... beautifully made, four in a box I bought a set of eight with the additional discount. they arrived in one large box somewhere around 35 lb not too heavy to manage. The terminal spacing is perfect when placed side by side with a 2 mm sheet of foam padding between the cells to insulate and allow for expansion when charging. I am fabricating some very rigid 1/8 inch aluminum plates to compress the cells together with threaded rods. this will be one of the most powerful battery packs I have ever constructed. All cell voltages were within 1 millivolts of each other upon receiving. Excellent quality and packaging!

These were delivered to me inside 2 weeks and after approx 30 cycles they appear to be working as expected and have the rated capacity. All appearances that they are grade A cells.