ZNEX POWERPACK 5000mAh | V2 with 5200mAh | Output 1A | External Lithium-polymer Battery for Apple iPhone (4S, 4, 3G, 3GS), iPod, BlackBerry, Samsung, HTC, Motorola, Nokia, LG, Sony-Ericsson, Tizi Mobile TV, Kindle DX, mobile GPS devices, PSP, Nintendo, MP3 player, Tom Tom, miniHomer more. (Electronics)
I have the power pack always there when I'm on several hours or days to arrive. Since I use my iPhone 3 GS as a "mobile router" for my iPad 2 the iPhone battery often goes pretty quickly to its knees - the ZNEXPOWER PACK 5000 I have no more prob
