This 1500mAh OEM Sized Extended Life Battery will not only replace your current battery, but will also provide up to 20% more power than the battery that initially ships with the HTC Touch. With this battery, you're gaining considerably longer device usability, without extending the shape of your phone. For those users on the go without access to an external charging alternative, this battery will give the extra boost in life that you need! (No Extra Door Needed!)