... type: Lithium-ion Polymer external portable power bank for iPhone 3G, iPhone 3GS, iPhone 4 /4Sspecification Product Name: External power bank ... 46*16 mm---Color: Black, Weight:45g---Compatible with iPhone 3G, iPhone 3GS,iPhone 4 /4S and most iPod (Excluding iPod ... 5.5 hours on WiFiexternal portable power bank for iPhone 3G, iPhone 3GS, iPhone 4 /4S/photosrelated productsmore elctronic productsabout us ...