Monoprice 109590 2000mAh Backup Battery Case and Charging Dock for iPhone 4/4S - Retail Packaging This case features a soft-touch rubberized finish and is designed to fit both the original iPhone 4 and the subsequent iPhone 4 and 4S models It has cutouts for all the connectors and controls except the dock connector which plugs into the phone The case is like having a spare battery for your iPhone