C Battery Eliminator

thingiverse

In my past experiences, I've had various devices that relied on C batteries, mainly LED lights. To bypass the need for dowel rods and screws, 3D printing has been a game-changer. Using these devices as auxiliary lighting can consume quite a few batteries. My lamp, for instance, requires three C batteries, each with a voltage of 1.5 volts, totaling 4.5 volts – close enough to utilize a USB power supply at 5 volts. Even when using multiple batteries in series, the connections remain minimal, necessitating only two links: one to the positive side and another to the negative side. To secure the wire on both sides, I employed an M3 screw measuring 12mm in length along with a nut. To replace one battery, I designed a new body and two caps (one for each end). On the bottom of the body, I incorporated a removable circle to facilitate bonding with the build plate. I strongly suggest printing these designs in high-quality mode as they didn't require supports or rafts. A 20% infill worked perfectly well for me. Please note that the wires haven't been connected to the USB power supply in these images; it's only useful once they're properly wired up.