Up to 38 hours non-stop 3G 3Gs iPhone movie playing time for imp500, the most powerful 3G 3Gs iPhone and 3G iTouch External Backup Li-ion battery will extend your 3Gs iPhone iTouch movie time up to 38 hours total 400% of 3G iPhone battery life! This is ultra powerful and reliable Li-ion 3G 3Gs iPhone backup battery power pack, which can immediately add 38+ hours video playinng and 180 hours Audio playing time to your 3G and 3Gs iPhone, iTouch and iPod classic MP3 player, which is the largest capacity 3Gs iPhone battery that you can find in the USA market! Its capacity is 5000mAh at 5V output voltage. It can be directly recharged up via USB port. It can power up your mobile device through a USB cable. This battery pack are light in weight (120g) and environmental safe Key benefits for the Li-ion battery pack imp500. Boost 3G iPhone video play time up to 38 hours (with speaker on). Total 400% of 3G and 3Gs iPhone battery, light weight 130g, mini size 3.9x2.2x0.6. Boost 3G iPhone internet time to 38hours, audio time up to 180 hours. It can power all the latest 8G, 16G 3G 3Gs iPhone, 8G,16G 2nd and 3rd generation itouch, all the latest ipod video classic 30GB & 60GB & 80GB & ipod nano 2GB & 4GB with 3Gs iPhone connector. It can also can power the major brand cell phone like blackberry with correct connectors adapter, Nintendo DS and Gameboy with correct adopters. Standard package includes the following: IMP500 3G 3Gs iPhone backup battery pack 5000mAh