3S 12v Lithium SLA Battery Capacity Indicator for Screwdriver Battery Capacity Tester Display

Size: 3*61*15mm approx
Cable Length: 140mm approx
Operation:
1. Please processing with your fingers lightly press the red button when charge or discharge, when the LED lights, the light board line current is about 30mA.
2. Release the finger, LED lights will go out.
A total of 5 small lights
suits 12v lithium 3s and 12v lead acid batteries
suitable for retrofit onto existing appliances with 12v battery.