Tiny 3.6V rechargable battery (I got mine from a broken toy helicopter)

Green Lantern Lantern and Ring

Green Lantern Lantern and Ring

One of my friends is a fan of the Green Lantern, and he thought it would be cool to have a glowing ring that charges when put inside a lamp. I realized that I already had something similar in my Upgraded Indestructible LED Lantern project, so I decided to build it.