Eton Rukus solar powered bluetooth speaker system
This bluetooth wireless speaker/docking station is unique in the way that it can charge itself with solar energy. It has got built in monocrystal solar panel that chargers Li-ion 1500mA battery. This is one of the best portable speakers for outdoor usage that we have seen. It will work for more than 8 hours with one full charge, and will charge the docking station in about 6 hours, depending on the intensity of the sunlight.