iGo powerXtender Universal Battery Operated Charger for $4.00

The iGo powerXtender provides emergency power for your mobile gadgets anywhere you go, using just 2 AA batteries (alkalines included). You'll get up to 10 hours of talking, 20 hours of game playing or 28 hours of audio playback (see note) when combined with one of iGo's separately available interchangeable Power Tips, which are configured to precisely fit and charge specific models of mobile phones, MP3 players, and other gadgets.