Review on 🔋 Premium 5PCS 1S 3.7V 4A 18650 BMS Charger PCB Protection Board for Li-ion Lithium Battery Cells by Allison White

I needed a board that would protect the battery while discharging/in use. I will not provide charge from the circuit, only discharge. They are not suitable for my use as reading the description said this should work for me I'm giving it a 2*. I connected B+, B- and BM as indicated. I connected P- and P+ to my circuit (they are connected to the LM2596 to reduce the voltage). It's not stressed at all. I read here in the comments that if I bridge P-/B- it works. It then supplies electricity. At least in this configuration I do NOT think it offers any kind of battery protection. Twice I found that the data logging stopped at about 5.3 volts. The proposal probably didn't cut off power nor provided over-discharge protection. At least 2 if not 4 cells were probably killed in this way. I'm switching to a board called "HX-2S-JH20 v1.0" available from Revain (I have a UMLife board). P/B jumpers are not required. I hope it will stop the discharge better than this one.