Mophie has made what might be the chunkiest iPhone 4 / 4S battery case we've ever seen. The Juice Pack Pro is styled like the company's Powerstation Pro external battery, but rather than packing a 6000mAh cell, it includes a 2500mAh unit and space for your phone. The capacious battery should extend your iPhone's battery life by around 150 percent. Mophie says the Juice Pack Pro "exceeds military specifications" for ruggedness (specifically the MIL-STD 810G standard), and is splash-, sand-, and shock-proof.
The Juice Pack Pro has water-tight port covers, a built-in screen protector, belt clip, and a battery status indicator. As your dock port will be covered by about an inch of rubber, the case comes with a Micro USB port and cable for syncing and charging your phone with. The Mophie Juice Pack Pro is on sale now for $129.95 — only $10 more than the 2000mAh Outdoor edition. If you can stomach having such an aesthetically-challenged case entombing your iPhone, it's not such a bad deal.
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