Review on Comidox 4S 20A 14.8V Li-ion Lithium 18650 Battery BMS PCM Protection PCB Board Module with 16.8V Overcharge, Over Discharge, and Short Circuit Protection - Pack of 2 by Kevin Webb

Name: Comidox 4S 20A 14.8V Li-ion Lithium 18650 Battery BMS PCM Protection PCB Board Module with 16.8V Overcharge, Over Discharge, and Short Circuit Protection - Pack of 2
Item: Comidox 4S 20A 14.8V Li-ion Lithium 18650 Battery BMS PCM Protection PCB Board Module with 16.8V Overcharge, Over Discharge, and Short Circuit Protection - Pack of 2
Rating: 1

September 27, 2022

Not only can be used with batteries.

As others (and the seller) have pointed out this does not work, if you just put in charged batteries and connect a load it will output zero volts between the P- and P+ terminals. You need to connect an external charging voltage (16.8V) to P-P+ to make the BMS "turn on", after that you can remove the charging voltage and then the BMS will output voltage from the cells. Therefore, if your application is not constantly connected to the charger, it will not work.

Pros

Easy to use

Cons

Doubtful

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