When the sun hits the solar panel the energy is stored in a battery. If you need to light up the darkness, you simply switch it on by pressing the big button. Thanks to the super-efficient Sunboost chip, WakaWaka absorbs the maximum amount of power out of sunlight. The WakaWaka Power+ and WakaWaka Base have a special extra feature: a charging function. Plug in any 5V chargeable USB device and the WakaWakas will start charging it.