Hypercel 1100mAh Standard Battery for HTC EVO Touch Pro 2 Tilt 2 Hero and More Battery is rated at 1100 mAh. Powerful Lithium ion battery technology has no memory effect either! Light weight battery is approximately 2/3 the weight and size of a Nimh battery of the same capacity! This standard duty battery gives satisfactory talk & standby times! Note that a new lithium ion battery's full performance is only achieved after 2-3 complete charge and discharge cycles.