The Galaxy S6 is a great device, but our biggest problem with Samsung’s new phone is its non-removable battery. Thankfully, Mophie has our back with a new battery case for the Galaxy S6 and Galaxy S6 Edge. The company’s 3300mAh juice pack promises to more than double your battery life. That’s on top of the 2550mAh battery in the Galaxy S6 or the 2600mAh Galaxy S6 Edge. That same case...