18650 Lithium Battery Capacity Indicator Module

1. When battery voltage is over N*3.3V, it will illuminate 1 block electricity quantity
(note:N represents battery quantity)
2. When battery voltage is over N*3.5V, it will illuminate 2 blocks electricity quantity
3. When battery voltage is over N*3.7V, it will illuminate 3 blocks electricity quantity
4. When battery voltage is over N*3.9V, it will illuminate 4 blocks electricity quantity
5.When battery voltage is less than N*3.3V,4 blocks display will be off;it represents battery is less than 3.3V,and you can charge the battery