LiPo Battery Tester & Low Voltage Buzzer 1S to 8S

Battery testers come in handy when testing for your batteries' if it gets too low and avoid permanent damage to the battery.

This module could check your battery's voltage. It has a built-in 3-bit 7-segment display to show the voltage read from the battery. It can also be used as an alarm if one cell falls below the preset voltage. You can use the built-in button to modify the voltage from 2.7V to 3.8V or turn it off. This module could work from 2 to 8 battery cells. 

This module has 9 pins, 1 for the negative pole of the battery, and the other 8 is for the positive pole of each cell.

This module could give you a better understanding of your battery is already a faulty one or not.