iPhone 5S Battery Case, Lenmar Meridian 2300 mAh MFI Approved [Slim] [Extended Battery Charger] [100% Additional Battery Life], Black Black Rubberized Case with access to all ports - MFI CERTIFIED- 1 Year Warranty Capacity: 2300mAh = 1 full charge providing hours of extended use, Input: 5V/1A - charging the phone from the battery pack LED power indicator for battery power level, on-off power to control when to use the extra power