For all the people out there who like listening to the radio while they're in the shower, various companies offer waterproof battery-operated "shower radios." There's nothing particularly wrong with these radios, but ... why change or recharge the batteries if you don't have to? No, we're not suggesting running a power cord into the shower. Instead, you might be interested in getting a water-powered radio.
Power is generated by the force of the running water, which flows through the otherwise-waterproof radio and spins a micro turbine inside of it. A great example of using a free and available resource. You can even keep listening to it while you're toweling off, without leaving the shower going, as an integrated Ni-Mh rechargeable battery stores and releases excess power generated by the water.
Source: gizmag.comAdded: 5 November 2012