Halo Samsung Galaxy S III / S3 Extended Battery Case - Black/Silver Light-weight, strong, and stylish protective case made for the Samsung Galaxy S III Built-in 2000mAh battery, add 72 % run time to your phone with original battery* Holes in the case allow for proper use of headphones, camera, flash, and charging Power and charge Samsung Galaxy S III Charge and sync via Micro USB. Charger turns off automatically