The powerful 2200mAh built-in battery can effectively double the battery life of iPhone 5, which adds additional 8 hours of talk time and 10 hours of web browsing time. * Featuring a fully protective hardshell case with the minimum added bulk. Enjoy the comprehensive protection while still maintain the slim form factor of your iPhone. * The case featuring a MicroUSB input port and lightning output port, and can be charged together with the iPhone via included the MicroUSB cable. * The maxboost defender deploys the most reliable battery technology, which can live up to its standard and being rechargeable for more than 500 cycles. * The case also has the following functions built-in: charging switch, LED battery level indicator, charge & sync through the case, headphone jack cutout, function button cutouts.