The battery should be charged regularly to ensure that the phone is always ready for use. The battery can be charged even if it is not completely flat.
You can use the phone while the battery is charging. Follow these instructions to charge the battery on your Apple iPhone 3GS.
- Connect the charger to the phone
Connect the charger to the socket in the bottom of the phone and to a wall socket
When a flash is displayed in the battery icon, charging is in progress (it may take a few seconds before this happens)
- End charging
When the battery is fully charged, you can remove the charger from the wall socket and the phone