4x AA battery holder / case

cults3d

You can snag this gadget for 76 euro cents on ALiExpress, but as makers, we're not ones to settle for off-the-shelf designs. I crafted a classic version that just so happens to fit snugly in my OTTO robot. For the + contacts, I employed four pushpins, which can be easily pushed through the holes with a hot solder iron. To secure the - contacts, I simply used some springs lying around and Hot Glued them into place within the little rings to center them properly. I'm confident you'll be able to pick up where I left off without much trouble.