Etón today announced the availability of their Mobius NSP300B Rechargeable Battery Case for iPhone 4, which was originally announced this year at CES.
The admittedly stylish (for having a solar panel strapped to it, that is) case packs in an 1800 mAh rechargeable lithium ion battery, high-efficiency monocrystal solar panel, and micro USB to charge the battery. Other features include LED charge indicator lights and a stand by switch to turn off direct power transfer. In other words, hitting the stand by switch will let you to collect power without using it, allowing you to control when the case is actually powering your iPhone.
As you can see from the chart below, Etón estimates approximately 1 hour of solar charge will provide you with up to an additional 25 minutes talk time, 20 minutes of data usage (3G), 35 minutes of video playback, or 145 minutes of audio playback. In comparison, a fully charged case will provide you with an additional 5 hours talk time, 8 hours data usage and video playback, and 32 hours audio playback.
Other features of note… it weights 3.4 ounces (96.4 g), includes a micro USB cable, and has dimensions of 61.9 x 129.5 x 22.2 mm (W x H x D). You can grab the Eton Mobius NSP300B Rechargeable Battery Case on Amazon now for $78.
We also told you last week about LilyPad, a solar powered iPad case currently being funded on Kickstarter and available for pre-order now.