Medical students and residents often need to carry their smartphones in a battery-powered case so that their phones last over 24 hrs. If they are in the hospital on-call, they often need to be there overnight. Sometimes you are running around so much that you don't even have time to plug your phone into a wall outlet. That means you may need to carry your smartphone in a battery case. That's the easiest way to ensure that you have power throughout your long shift.
Mophie has the 3 Juice Pack cases for the iPhone 5:
- Air: 1500 mAh battery
- Helium: 1700 mAh battery
- Plus: 2100 mAh battery
The Juice Pack Air and Helium are both very thin and light. The Juice Pack Plus provides the greatest battery extending power at the expense of greater bulk and weight.
I've personally used the Juice Pack Air and Helium. The Helium is the lightest and narrowest. I'd say that it's also the thinnest, but I honestly can't notice the difference in thinness between the Helium vs. the Air. The Helium is a bit narrower and lighter than the Air. The Helium has cut-outs for the sleep/wake and volume buttons. The Juice Pack Air and the Plus have button overlays which are easier to press.
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