Last April, Logitech partnered with ZAGG to release a rather smart iPad case with built-in physical keyboard. The company has now announced a new book-style case for Apple's tablet where the power for the included Bluetooth keyboard comes from batteries juiced up by built-in photovoltaic panels. The Solar Keyboard Folio won't help an iPad last any longer, though. Fortunately, Wireless NRG has developed a tough extended battery case for the iPad that also packs light-soaking cells on its flap that can keep the protected tablet going for up to ten days. The panels on both cases don't just rely on direct sunlight for power, as they can also take advantage of indoor light too.
Read the full article: iPad protective cases use light to extend functionality and battery life