Note: Color and Design of the PCB may differ from the Images. 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
