Jumper Card: Backup Power in Your Wallet
The Jumper Card works primarily as a charger, and can pull power from any USB port. A major factor that separates the Jumper Card from similar devices, it includes the three most widely used connections: the Apple Lightning connection(iPhone 5 models), Apple 30-pin (Pre-iPhone 5 models), and the standard Micro-USB. That said, there is an on-board battery in the card that holds 480 milliamp hours, which can add about one hour of life to a phone.