If the iPhone Survival App article excited you, you’re going to love this. Eton has released an unobtrusively designed solar charger/case just for the iPhone named the Mobius ($79).

The Mobius features:

• A lithium-ion battery
• Monocrystal solar panel
• Battery charge indicator and solar charge indicator
• Wide holes to keep all the buttons, ports, and camera unobstructed

Eton claims the battery is large enough to double your iPhone’s runtime. And at 4 oz., it won’t weigh you down.  The snap fit design makes it easy to take the Mobius case on and get it off without damaging the glass.