8.4V 2 series Li-ion Lithium Battery Capacity Indicator

Power Level：

• L1: 4.5-5.5V
• L2: 5.5V-6.8V
• L3: 6.8V-7.4V
• L4: 7.4V-8.0V
• L5: 8.0V-8.4V

Size: 2.7*62*15.8MM 

Cable Length: 140MM

Operaction: 

1. Red cable to positive, black cable to negative, press the red button, it will show the capacity of battery.
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!