iCanonic Elite Samsung Galaxy S3 Battery Case - Matte Black, Protective Bumper Style Battery Case for Samsung Galaxy S3, Samsung Galaxy SIII, Samsung Galaxy I9300 The enclosed 2000mAh battery the Elite battery case can effectively doubles the battery life of the Galaxy S3 Phone. It can easily extend your Galaxy S3 usage time beyond 10 hours of talk time or 30 hours of music time. The Elite Battery case is weighted at an industry-best 3oz and measured at an ultra-slim 15mm of thickness. Despite the minimal added weight and size, the case also offers a comprehensive protective shell for your Galaxy S3 against drops, scratches and normal wear and tear. This Galaxy S3 Battery Case features a built-in microUSB output port which can be directly connected to your phone providing direct power to the phone. Also, utilizing the included micro-USB input port, users can also charge or sync their phone without ever having to take off the case. The unique 2-piece bumper design makes it easy to install / uninstall the case on the phone without scratching the S3, while still maintaining the minimal overall form factor. Offering more than most standard cases, the Elite Battery Case has an integrated charging switch, LED power level indicator, charge & sync through technology built into the case, a headphone jack cutout, and an easy-to-access function button cutout.