The phone battery is partly charged when you buy the phone.
To charge the phone using the power adapter
Connect the phone to a power outlet using the USB cable and the power adapter.
To charge the phone using a computer
Connect the phone to a USB port on a computer using the USB cable included in the phone kit.
Maximising battery performance
You can use the following methods to improve your battery performance:
Decrease the brightness of the screen.
Charge your phone often. The battery lasts longer if you charge it frequently.
If you are in an area with no coverage, your phone repeatedly scans for available networks. This consumes power. If you cannot move to an area with better coverage, turn off your phone temporarily.
Turn off 3G, Bluetooth™ wireless technology and the Wi-Fi™ connection when you do not need these functions.
Do not cover the phone antenna when you are engaged in a call or when transferring data. The antenna is located at the back of phone