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The SoliCharger, which works with the iPhone 4 and iPhone 4s, combines a case, solar charger and speaker systems into one device. Weighing about 9 ounces, the case also comes with adapters and can be charged through the USB port on your computer if you can't find some sunlight. SolLight says you can also use the case with a Sony PlatStation as well as other MP3 players or mobile phones. The device usually costs $59.95 although the company was running a holiday special for $49.95.