Your battery has been partially charged at the factory, but you may need to recharge it before you can use your phone.
If the battery is completely discharged, it may take several minutes before the charging indicator is displayed.
Tip: You can use USB charging when a wall outlet is not available. Data can be transferred while charging the device. The efficiency of USB charging varies significantly and it may take a long time for charging to start and for the device to start functioning. Make sure that your computer is switched on.
To save power: