EC TECHNOLOGY Retail Packaging 2200 mAh New design with a stand-by Rechargeable, Portable Battery Juice Golden protective Case & Extended Battery for iphone4 / iphone4s Extended battery juice case for iPhone 4 - 2200 mAh Extends Battery Power: 7 hrs talk time/ 11 hrs Video Playback/46 Hours Music Playback/380 hrs standby time Great as a back-up , or as a permanent power case solution ; Auto power Output Control Sleek , Low-Profile design ; Rechargeable up to 500 times - Charges through USB Cable 6 month product replacement warranty