Inside Power Orb Ver 2

I cut the side where the light is so you can fit a 3.7V battery inside nicely.

Just twist the piece slightly inside the outer shell to have it stay in place. The friction between the 2 parts keep it in place.

You still have to cut a whole on the outer shell to install a switch. My limited knowledge kept giving me an error in meshmixer. Feel free to make version 3 of this!