Sign up for an Award
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
Actually, there still remains some power in the
used batteries. This R-battery takes the form of
a D type battery into which used AA or AAA
batteries can embed. Then, by transforming
and collecting the remaining power in the used batteries, we can use the device again and again.
Shuo Wang, Hansen Wei, Ying Zhao