The Energizer Battery Case has pass-through, high speed charging capability with “smart” battery technology that detects the iPhone® power status indicated through hidden LED’s on the back of the case. Two charging options provide either high speed quick charge to iPhone® first, then to the case, or get simultaneous pass-through charging of the iPhone® and AP1201 case for efficient power management. The AP1201 is made from recycled silicon rubber and eliminates the need for iPhone® 4 users to curb their usage or to avoid power-draining applications, and will keep the device charged throughout the day. This rechargeable case with built-in battery nearly doubles the life of the iPhone® while offering full protection that you never need to remove, providing a continuous permanent power source. The AP1201 features an integrated bumper that eliminates the signal loss and antennae interference issues that many iPhone® 4 users have experienced. The AP1201 is also a direct response to the power deficit that mobile devices consume,and is just one of a full line of Energizer® Energi to Go® solutions that is bringing convenient power to consumers.