Emergency Backup Charger to Extend your iPhone power. From the unique outlook, and able to extend your iPhone talk time up to 3 hours and audio play back up to 18 hours, it will be your best choice for the battery solution, not only outside appearance, but functionally solve the power problem with daily use of the iPhone. Moreover, the battery has an innovative design which is using EL film on its front panel to display its power status clearly, which also the world's first one who use EL lighting film as power indicator. The easy operation is another aspect of the battery even though there is no extra button on it. The battery would charge your iPhone once you connect to the iPhone, and it will show you the remaining power while you remove it from your iPhone!