... batteries for use in various laptops, digital cameras, camcorders, PDAs, mobile phones, walkie-talkies and universal internal & external batteries, single chargers ... 2 in 1 function, solve the signal problem perfectly.-Accurate display of power, low battery LED flashes when reminder.-With intelligent ... , UPS, TNT, EMS, etc. which as per your requirement. Portable mobile phone Power Bank for iphone 4G