Battery Desktop Charger with USB Output for HTC ThunderBolt 4G / Incredible HD Stay connected to family and friends by making sure the battery of your HTC ThunderBolt 4G / Incredible HD is always charged. Enjoy flexibility with this charger that allows you to charge your spare battery through a wall outlet while charging your phone through the 5V USB port.Multi-protection circuits prevent overcharging and overheating. LED charging indicator shows charging status.Foldable A/C plug for convenient portability.Input: AC 100-240V. Output: DC 4.2V-300mA.USB output: 5.0V DC (USB cable NOT included). Battery charger only; Battery and devices are NOT included.