The AQUA TEK S, from Snow Lizard, is a waterproof, solar-powered iPhone 4/4S case with a built in battery, not only protecting the ubiquitous smartphone, but also providing a backup power source. The case is made from a thick polycarbonate shell with rubber grips, is waterproof to 20 feet, and the case allows full use of all of the phone's features and controls, even underwater.
The AQUA TEK S Kickstarter campaign was launched in February of 2012, with a goal of $75,000. The project ended up doubling that amount, raising over $160,000 to put the case into production.
The case is now available for pre-order from Snow Lizard in a variety of colors, priced at $129.