Cingular 8525 HTC Tynt Hermes Ext 3000mah Li-ion Battery w/ Door Brand new non OEM Li-Ion battery Battery capacity: 2400mAh w/ Battery Door Rechargable: Recharges in phone or in the battery drawer of Cradle Kit Safe: Built-in overcharging protection Compatibility: Cingular 8525 HTC TYTN Hermes