The Juice Pack H2Pro is Mophie's first waterproof product, combining the extra power provided with a battery case with protection from the elements. According to Mophie, the H2Pro has an IP-68 rating (and a military rating of MIL-STD 810G), which means the case will work even when submerged for an extended period of time (1.2m for 30 minutes). In addition to being waterproof, it's also going to keep dust and dirt away from the iPhone, and it offers protection against drops.
Since it offers total device protection, there's a flexible membrane over the front of the phone's display, which Mophie says allows for complete access to Touch ID and the touch screen of the iPhone. There are also integrated mute switch, volume, and lock buttons so every iPhone feature remains accessible.
Like Mophie's $100 Juice Pack Air, the Juice Pack H2Pro offers a 2,750 mAh battery. The iPhone 6 has a 1,810 mAh battery, so the H2Pro can offer approximately one and a half charges. There's a power button on the case to toggle power on and off so it can be used without draining the extra battery capacity.
The H2Pro is 0.69 inches thick (17.4mm), so it's going to more than double the thickness of the iPhone 6 (6.9mm), but that's not unusual for cases that offer heavy drop protection and waterproofing.
The Juice Pack H2Pro can be pre-ordered from Mophie's website for $129.95. It's estimated to begin shipping out to buyers in late May.