HTC OEM Sync Transfer USB Desktop Cradle Dock with Spare Battery Charging Slot for Verizon HTC Thunderbolt 4G Brand new original HTC charging dock. HTC Part #: 99H10227-00 Sync and charge your phone, and a 2nd battery at the same time Charges an additional spare battery (standard or extended) at the same time while charging your phone. Includes desktop charger, USB cord and travel wall charger