Incipio IPH-700 offGRID PRO for iPhone 4/4S - 1 Pack - Carrying Case - Retail Packaging - Black Unleash 1600mAh charging capabilities per battery included. Rechargeable and interchangeable batteries to keep your iPhone 4/4S fully charged. Standard protection and the highest quality materials guard and charge your iPhone 4/4S. Four blue LED indicator lights to indicate your backup battery life.