Stitchway UltraPower 1900 mAh Backup Battery Charger for iPhone 3G, 3GS, 4, 4G, iPod, and iPod touch – External, Portable, Rechargeable (Black)
WORKS FOR iPHONE 4 and 4G. Also iPhone 3GS, 3G, 2G, iTOUCH, iPod. If your apple device depletes its battery early in the day then …