The Incipio offGRID PRO Backup Battery Case (Black) provides extra battery life to your Apple iPhone 5, up to 4000mAh, with the 2 included batteries. The offGRID PRO is a portable power and case solution all in one. It combines elegant design with functionality, producing a high-tech, user-friendly case. The rechargeable battery can be easily installed and removed by utilizing the finger groove on the case and the ridge on the top of the battery. You can monitor the amount of backup battery life with the four blue LED lights; four lights indicate the offGRID PRO is fully charged.