Hey everyone,
I’ve been recently modding my Gameshell, and thought I’d be nice to share with the community!
As I played again and again with my Gameshell, I grew tired of having to recharge it often through a long gaming session, so I decided to update the battery to one with a larger capacity. I chose 18650 batteries, for they are cheap, easy to find, and much reusable. I also enjoy the form-factor, making it looks like old-school Gameboy batteries 
So I printed a back plate and a 18650 holder, got some wires up and now I have a 3500mAh battery that’s easy to swap if needed.
I think I’ll try to print a better back (both in print quality and design) soon. 3D modeling is new for me and it’s definitely not an easy task.
I’d love to have some feedback and ideas to make this better! 