100% mAh Capacity inside for excellent backing up your mobile phone during heavy usage over long duration. ??Totally tested before dispatch. ??You're requested to install it via a professional. ??You're highly suggested to use original charger for it's longevity. New Premium Battery stays connected with you, your family and your friends by providing additional battery power. The only replacement for the mobile battery you're ever gonna need with comparable standby and talk time.