QQ-Tech Newest 3200mAh High Capacity Power Bank for Samsung Galaxy S4 / Samsung Galaxy S IV / I9500 External Rechargeable Battery Pack Backup Charger case with Viewing Stand & Battery Level Indicator-Black The powerful 3200mAh built-in battery can effectively double the battery life of Samsung Galaxy S4 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 via included the MicroUSB cable 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.