1).1900 Ma lithium ion battery 2).Standby time >380hs 3).Travel battery for iphone 4/4s 4).Portable rechargeable batteries ---Output Voltage: DC 5V---Output Current: ≤700mA ... iPhone 4/4s---Petite,convenient,easy to use,high capacity---USB cable charge,4 LED power indicators ---Color: Blue Green White Black PurplePhotos: External Battery Packs For iphone 4/4s ...