Powerful change part 1: Batteries and possible alternatives for the mobile market

The batteries and the alternative power sources used by the consumers in varius wearable electronic devices are discussed. The ideas to use human and ambient power sources to reduce wearable's reliance on batteries are proposed. It is stated that the mass vibrations resulting from human walk can generate up to 200 microwatts which can be effectively utilized in operating small devices. The power recovery system for walking is an extension for wearable devices.