4S 16.8V 18650 Lithium Battery Capacity Tester Indicator Power Level Tester BMS Li-ion Charge discharge PCB Module 18650 LCD
Power Level：
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L1: 8-10V
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L2: 10V-13.0V
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L3: 13.0V-15.0V
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L4: 15.0V-16.0V
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L5: 16.0V-16.8V
Size: 2.7*62*15.8MM
Cable Length: 140MM
Operaction:
1. Please processing with your fingers lightly press the red button when c harge or discharge, when the LED lights, the light board line current is about 30mA.
2. Release the finger, LED lights will go out, light board line off, no current through.
3. Board with reverse function, the line is connected or wrong is no problem, adjust it over
A total of 5 small lights, display power, suitable for reverse converter lithium battery power tips!