Engadget has learned that Otterbox will be releasing its Defender case with iON Intelligence on April 18th. First shown at this year's CES, Otterbox's new case provides full body protection to the iPhone 4/4S along with additional power through a 1,450mAh battery. The additional should roughly double the battery life of the device with the iON Intelligence app automatically turning the external battery on and off when it's needed. The iPhone 4/4S version will be sold through Otterbox's website for $130, while models for other popular iOS and Android handhelds are currently in the works.
