iGo powerXtender is a totally portable power source. Provides an emergency power source when away from power outlets. You'll get up to 10 hours of talking, 20 hours of gaming or 28 hours of listening from 2 AA batteries. It's reusable; use again and again just by replacing the batteries. It's perfect for mobile electronic devices such as mobile phones, smartphones/PDAs, Bluetooth headsets, MP3 players and portable gaming units. Combine this ingenious charging solution with a power tip for each mobile device and you have a backup power supply for all. Power tips are required for use with this charger and are sold separately; be sure to purchase the power tip for this phone as well as any other power tips you may need for your other mobile devices.