Charging the battery regularly will ensure your mobile phone is always ready for use. The battery can be charged even if it isn't completely flat. You can still use your mobile phone while the battery is charging.
Connect the charger to your mobile phone
Connect the charger to the phone socket and to a power point.
When the battery charging icon is displayed, charging is in progress.
When the battery is fully charged, you can remove the charger from the power point and your mobile phone.
*Please refer to the HTC website for more information or further support.*