For iphone4 power bank; 1.Good quality; 2.OEM&ODM; 3.Low price; 4.Offer all portable power bank. For iphone4 power bank Intelligent MCU controller, monitoring various operating status.Over current and short circuit protect.Auto power off, make better use of battery energy.Over current, over charge, over discharge, overheating and short circuit protection .With LED Torch functionLight and ...