The TYLT Energi combines a backup rechargeable battery pack with a rapid home charger. It's high capacity battery will fully charge your smartphone once while on-the-go. Also available in Micro-USB versionbuy here
Will provide up to 5 hours additional talk-time, one full charge to a smartphone, 1/3 charge to a tablet (7"), and 12 full charges to a Bluetooth device.
When the unit is plugged into a wall outlet, both the internal battery reserve of the Energi and your electronic device will be charged. The AC prongs fold away conveniently for on-the-go use.
Insert a USB cable to charge most wireless devices, including iPod, iPhone and iPad.
Press the button to reveal the battery level currently remaining in the Energi.
Flexible fold-away arm charges iPhones, iPods, and iPads without the need for additional cords.