1.Use premium components 2.Metal Surface++ LED Torch 3.Real 7400mAh Lithium ion Battery 4.CE, ROHS, FCC, PSE, MSD Coolup brand  External Battery for iPhone, 7,400mAh Capacity, Aluminum with Wire Drawing, PC/ABS Frame  : Key Specifications/Special Features:Specifications:Lithium-polymer batteryDimensions: 115 x 75.5 x 15mmWeight size: 190g (maximum)Color: silverCapacity: 7,400mAhRated input: 5V DC/1ARated output: USB 5V/1AMaterial and technique: 5052 imported aluminum with wire drawing, PC and ABS frame with vacuum platingFeatures:Auto detecting for the charging current and USB output can charge not only for iPod, iPhone but also for RIM's BlackBerry, Sony's PlayStation portable, MP3/MP4 players, MID, GPS, Bluetooth, mobile phones and moreSmart size, very portable, power whenever and whereverSupports charging and discharging simultaneouslyStill keeping 80% capacity after your battery using more than 500 timesIntelligent protection without short-circuit, electric leakage, overload, over-charge and over-discharge   

Coolup brand External Battery for iPhone, 7,400mAh Capacity, Aluminum with Wire Drawing, PC/ABS Frame