Samsung Galaxy S6 4200mAh battery case with Kickstand Black, external portable power bank charger, slim case for Galaxy S6, latest higher capacity 4200mAh (Black) This case extends the battery life of your Samsung Galaxy S6 phone by giving it a backup battery life of 100%. It features the latest powerful 4200mAh Lithium Polymer Battery Incredibly lightweight Slim doubles your battery life without doubling its size, impact resistant and easy to grip case 4 LED indicator lights for power . 1 LED = 25%, 2 LED = 50%, 3 LED = 75% and 4 LED = 100% power.