Light-weight, super-slim design to carry with your iPhone or iPod
Conveniently charged via any USB ports
High-capacity, rechargeable lithium-ion battery
LED indicator for battery power level
This item can be used as an emergency battery anytime you don't have access to a computer, car charger or wall charger.
When you need to recharge the backup battery just use the iPod/iPhone USB sync cable to connect it to computer's USB port or USB AC charger.
Note: You can not charge the phone and the battery at the same time.