DESCRIPTION How many times have you found yourself out and about with a dead phone? The Power Mate Plus provides you with hours of extra use for your iPhone 3GS/4/4S. Just charge it, put it in your bag and use when needed. Battery life will vary depending on device and usage. Designed in the USA! DETAILS Built-in Lithium-ion battery charges via USB to computer system or power adapter. Charge Time: 3hrs Capacity: 1000mAh Input/Output: 5V LED indicator SPECS Weight: 3.2 ounces Dimensions: 3.8 x 3.8 x 0.7 inches