Spark Tablet Case Charges Your Tablet Using Solar Power [Running Out of Tablet Battery Power? Get a Spark Tablet Case & Never Plug in Again]
As with any mobile device, power is the one thing that would keep you (or your device) tethered to the mains at least a few hours per day. This case from Voltaic Systems will ensure you don’t run out of juice while outdoors.

Voltaic Systems’ Spark tablet case can fit any 9-inch tablet comptuer, which includes the iPad and most other similar size Android or other OS tablet. According to the specs, you get the equivalent usable time for each minute you charge the device under sunlight. So if you let the case charge your iPad for an hour, you get an hour’s use.
The Spark’s solar panels are waterproof and can withstand stress. The case outputs 8 Watts of power at 6V, and outputs to USB. This means the charger is universal, and you can actually charge any device that comes with a USB cable. What’s even better is that the case comes with its own battery, which can be used to provide backup power when the sun is out.
This means you can theoretically stay all day under the sun — and even beyond — and work/play on your tablet without worrying where the nearest power outlet is.

