Though the core of Mophie's new Juice Pack Pro ($130) is familiar enough -- a sled-like attachable case containing a battery pack for the iPhone 4/4S -- the rest of this design has been thoroughly rethought to provide ruggedized, military-specification protection for Apple's most delicate devices. The new case is waterproof, mud proof, and drop-resistant, now packing a 2500mAh battery promising over 150% additional battery life for the supported…
