Super Quality External 1900mah Battery Pack Power Green Iphone 4/4s with Protective Back Cover Go Portable Case Charger for At&t and Verizon Black!!!!!!
silicone rubber case with built-in rechargeable battery IPhone 4    eliminates prevents signal loss or antennae interference caused by direct contact    Lithium Ion Battery Into Protective Back Door Protective Back Cover    Extra thin and easy to handle; durable, nonslip material Rubber feel, non-slip comfortable grip    Super Quality External 1900mah Battery Pack Power Station