For those whose iPhone batteries lived -- or died -- on the extra power provided by a mophie juice pack case, good news -- mophie has just announced the juice pack helium. Why helium? Because it's lighter than air, as in the previous generation juice pack air, of course. It's a 1500mAh battery, which will replenish an iPhone 5 up to 80%, but it's packed in a case that's svelter than ever before.
