I recently got interested in these tiny arcade machines that you were able to find at pretty much any local retail store. At Walmart I got a Space Invaders one for $10 on clearance and made modified it to play all 4 games pre-programmed on the board instead of the 1 it shipped with which is a common hack that people have done. Then about a month later I bought another one from the same Walmart for $5 on clearance (how could you pass that up?!) and decided to try something different. This time I made the 4-game hack using the 4-direction joystick (hold the joystick in a direction and turn on the system to select a game), replaced the 3 AAA batteries with a rechargeable DS Lite Battery, and designed/3D printed a case for it in the style of a Gameboy (kind of). For some reason using the 3.7v DS battery worked perfectly fine. Originally I planned on making new buttons and changing the layout of them but then I decided it would be much easier to keep the original button PCB. The whole process went great without too much hassle.

Here are some pictures!



Full size image links:
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