The most probable development that would put an end to our battery addiction is energy harvesting. Sometimes called also energy scavenging, it means using energy which is “freely” available in the environment to power up the devices that would traditionally rely on batteries to function.

A solar cell is a device that converts solar energy into electricity. Recent developments in solar cell technology have made possible lower manufacturing costs with acceptable energy-conversion efficiency. Applications not possible before like utilization in fabric or thin-coating to a number of surfaces can now be achieved. 

Solar power and wind energy - DIY projects is for all those who care of Mother Earth.
These days more middle class, mainstream, citizens have the option of using alternative or renewable energy sources in their everyday lives. Solar and wind energy companies have been taking steps forward both in technology and sales.