12V 100A 4Series BMS Protection Board with Balancing with Overcharge/Overdischarge/Overcurrent/Short Circuit Protection for LiFePO4 Battery Pack

it works though i have not used the full 100 amp current but they keep working at at least 40 amp. The bms actually is still usable while charging as well. I have bought 2 of these and only one failed at the charging port side for some odd reason it would not charge anymore got it exchanged and everything has been fine sense and its been well over 30 days of charge cycles with my solar set up. Now that some one is getting a bit greedy with the price ill have to look for another seller that is cheaper with the same product.

I had good success using this small BMS. I just stuck to a 13.5ah battery pack comprised of 32700 cells, with 12.8 nominal voltage. I used a heat sink. I have ran a 18 watt shop light for 8 hours before the BMS shut off the pack. Worked as I would hope. Turned around and charged the pack with a Lithium Iron Phosphate charger, the charger is one rated for 40 Amps. An intelligent charger, applying what is needed and shutting off when fully charged. I use it weekly. I have two of these BMS and recommend them for light load application. You can run a LCD 30 inch TV with a small inverter, I ran a PS2 on it, lights. This is not meant for running electric heaters. Like household 30 Amp heaters. I use it for operating 12 volt heated jackets and gloves though. I recommend this product.

Bought this BMS because ebikeschool from YouTube recommended it. I tested on a 12 V. Trolling battery. But it did not put out 12 V only getting 11.8i bought a second B. M. S to double check voltage. And got the same thing. 11.8. Don't know why they are selling this as 12 V. When you do not output to a Volt, very disappointed in wasting my money. Might be something I don't understand.....

This is a great balance board with a heat sink and a super high amperage rating for charging batteries. I used mine on a bunch of 18650 batteries salvaged from old laptop batteries.

I used this to charge my 4s10p LiFePO4 battery pack using a CC/CV power supply at 15v as recommended. When it stopped, the cells were not close to being balanced. The specs actually indicate why this might be the case. The overcharge release is 3.65+-0.1v, which means it could be as low as 3.55v, whereas the detect and release voltages are both 3.60+-0.05v, which means it could be as high as 3.65v. Assuming the balancing occurs only at this detect voltage, the charging for a cell could stop (at 3.55v) before any balancing occurs.

I was amazed when I received it. I can't imagine pumping 100 amps through this tiny thing. I'm building a Ham Radio Go Box. I seriously questioned its capacity and did some more research. Somehow I missed its maximum charge current. My charger is 15amps, so I sent it back and bought a serious BMS that my battery won't eat for lunch.

Great!

Had a difficult time balancing cells. There this in my 40ah pack. Discharged it till low voltage cutoff. Then put 40a back in via an old car charger. All my cells balanced now within.01v. Pretty cool