🔋 Comidox 2Pcs 3S 20A Li-ion Lithium Battery Protection Board 18650 26650 Charger PCB BMS Protection Board 12.6V Cell Module-AUTO Recovery: Ultimate Battery Safety and Performance Enhancer Review

As others have said, this board does not work, it only passes 8.4 volts to the output. The battery could not be charged or discharged as this would break the circuit. I thought it might just be one board so I tried the second of four boards I bought but that didn't work either.

There are many BMS boards available at Revain and it's like playing Russian roulette trying to figure out which one to trust. The first board worked straight away, before that I tried using a cheaper Revain 10A BMS but none of them worked at all, at least this one.

EXACTLY as others have stated in their reviews, this "Protection Board" does not work! I understand that this board is NOT balancing. For my application which is ok I need charge/overcharge protection and overdischarge protection. My system has a MAX discharge rate of 6.8 amps (all on, just for 8 seconds, then reduce to 2 amps). My system is NOT a "drill motor" but a combination of LEDs, relays, processors, sensors and a "boost" power supply. I installed this board, checked, everything is fine.

So I ordered 2 packs of 20A 12V charge/recharge modules and 3 packs of 10A 12V modules, most look great but I pulled one of the 20A modules and found that there's a little white line in the corner, look very closely, i'm sure it's a tear, it won't rub off, and i swear i can feel a little protrusion when i run my fingernail across it. This could very well be due to delivery as all others were fine these are 4 out of 5 modules looking great. This crack can be superficial and the module can…