Instuction:

Take the battery out when empty

The display light turns on red during charging, green finished

Use 5V USB mobile charger and insert the Micro USB cable to charge the battery

Put the battery in the right place of the device frame. No mistake for anode and cathode

This battery can be charged by USB cable only. Can not charged by rechargeable aa charger

Note:

The first time you use it, the power of the battery is less than 50%

Please remember to charge the batteries every 3 Months if you don't use it. This will help you to keep the battery's long lifetime.