EnerPlex Surfr Ultra Slim Battery Backup & Solar Powered Case for Samsung Galaxy SIII, White, SFG-2100-WH Battery pack can be charged by either a conventional wall charger or the integrated solar panel on the back of the case Features a 2,100 mAh battery pack Battery and solar charging indicator Slim, yet durable design; 16.7mm thick Protective case defends your phone against bumps and scratches Ultra Slim case with integrated 2100 mAh batter wich provides 100% more battery life Integrated solar panel provides emergency energy. 30 minutes of sun produces a 5 minute phone call Slimmest and lightest battery case with integrated solar that provides robust protection for your device Charge and sync via Micro-USB with smart charge feature wich charges your phone before the case LED lights indicate battery life of case and when phone is charging via solar