3S 4S 5A Active Equalizer Whole Group Balancer Lifepo4 Lipo Lto Lithium Active Battery Energy Transfer Equalization Capacitor + Protective Case

I mean it's simple electrical theory - this balancer should work well. I just didn't think it would work THIS well....especially for the price. I have 16 * 300Ah 3.2v cells that were pretty out of balance, and this balancer got them balanced within a few days! The battery bank is on a Daly BMS which is *supposed* to have balancing, but clearly was not effective. I put this balancer on top of it, and all cells are now almost perfectly balanced.

Works very well. They are running 3S 20p 18650's.

I bought 1 for each of my 8S 150AH LiFeO4 battery banks, and they work very well.

Very good balancer, low consumption and works perfectly

Bought some 200AH LIFEPO4 drop in batteries (non-smart) and had issues reaching above 13.8v during charge, with more than half of them... I had some suspicions one cell or more were reaching 3.65v before the rest. They still pulled capacity so support wasn't much help. After cracking one open, I confirmed the imbalance. This balancer worked perfectly, and was able to sort out the imbalance in a few hours of on/off tinkering. Just make sure you wire it up right. I'm cautious so I monitor that no cell goes over 3.65v (LIFEPO4) and let it get to work. Now I can charge to the proper 14.2-14.6v on these batteries. Many cheap drop in batteries have a BMS that either doesn't balance, or if it does, it's at a pathetic rate of 30ma or so. This seems to be good quality including the case and 18awg balance leads. Highly recommend this active balancer with case! Only wished they also included a small wiring diagram in box. Saved screenshot from Amazon, so wasn't an issue, but it's my only complaint.