... . With lightweight, practical, safe and convenient several major features.For iPhone 3G, iPhone 3GS, iPhone 4G and iPod.With the ... , you can switch to cable for charging external devices.(such as iPod,iPhone,iPad,DSi,PSP,MP4,cellphone,bluetooth earphone and ... so on)Built-in rechargeable lithium-ion battery(1200mAh), battery power sustainable for ...