When power becomes an issue with mobile devices, it’s great to see companies create greener and efficient solutions for it. Eton has introduced a new solar rechargeable battery case for the iPhone. The Mobius case, specifically design for the iPhone 4, is equipped with a monocrystal solar panel (much like similar cases) that gathers the sun’s energy while charging up your phone without interfering with device usability.

Everyone could use a little extra battery life for the iPhone, especially if they depend on it for work and play as most people do. Thankfully, the market for iPhone cases and batteries is quite large, with plenty of options for users to pick from. It’s also a market where Mophie has certainly been making a name for itself. As such, the Mophie Juice Pack Plus is a pretty awesome battery case.

There are a lot of cases that offer to extend the battery life of your iPhone 4. One such case is Dexim’s Super-Juice Power Case. This white case claims to supply an extra 2000mAh to your device to allow for 6 hours of talk time, 10 hours of video, or 40 hours of music. While any amount of battery life that can be added to the iPhone 4 would be nice (I have to charge mine daily), these numbers are pretty large which is even better.

As if you haven’t already heard enough announcements about new iPhone battery extender and case combos, another one from Incase is ready for your holiday checklist. One of the interesting things about this case is that it’s designed to allow you to charge the phone without removing the case, a feature that will save some more »