Mobius case for the iPhone 4 allows you charge up your phone by using the sun, without having to carry around an external charger. Mobius is a huge improvement over previous solarchargers that relied mostly on clunky external designs with limited mobility. Mobius users simply place the case in the sun and charging starts immediately. The pack can also be detached and charged separately, the energystored for when you need it. An LED readout lets users know how much energy remains, and the pack is equipped with a slide bar to stop charging and save energy. For skeptics afraid of rainy days, Mobius can also be charged via a convenient USB port.
A full charge effectively doubles your battery life with an additional five hours of talk time, or eight hours of either 3G internet or video playback. If you don’t have time for a long charge, one hour in the sun will get you 25 minutes of talk time. The hard plastic case feels solid and the battery pack has a comfortable ergonomic design. It’s also seductively slim and lightweight, two advantages that indicate a graceful future for solar power given its relatively cumbersome origins.
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