Use the original charger to maintain optimal battery performance over the life of your device.
To charge the battery the fastest, plug the Charging cable that came with the phone into the port at the bottom of the device. Note: Your device charges quicker using a power outlet then when connected to a laptop or other power source.
Plug the opposite end of the Charging cable into the A/C Power Adapter, then plug it into a wall outlet.
You can also plug the Charging cable into your laptop USB port to charge your device however it will charge slower than a wall outlet.
When the device is charging the Battery charging icon will display in the notification bar.
When the device is completely charged, the Battery charged icon will display in the notification bar.
To learn more about your charging your battery download the user manual.