Milwaukee 12V battery tap plug

prusaprinters

<p>This tool is a plug to connect a Milwaukee M12 battery to your other 12V items, like portable tire or SUP air compressors. &nbsp;Print the main plug body and cap with your 3D printer. &nbsp;Get a cheap spatula from the store and use a Dremel tool to cut two 6mm x 21mm strips. &nbsp;Smooth the edges, drill a hole near the ends and solder up some 16Ga wires. &nbsp;Remove the supports from the plug body and insert the metal tabs. Pot it up with epoxy… I used JB Weld plastic bonder then clamp it to cure. &nbsp;Connect the wire ends up to your preferred quick connectors to make it useful for several devices. &nbsp;I am using XC60s.</p><p>These small M12 batteries will fill my 3 chamber kayak with a Shark 2-stage pump but it needs only about 5 psi. &nbsp;Some higher pressure tires and toys may need more amp hours. If so you can get the M12 XC batteries which will easily be enough to pump up and deflate anything… and the small ones are so, well, small, you can easily carry a few if you need them.</p><p>To ensure good alignment of the contacts slide the empty plug body onto the battery then insert the contacts (have the wires already soldered up) through the slots into the battery slots. &nbsp;Add the cap, making clearance in it with your Dremel if needed to make space for the solder joints, then add epoxy and clamp it.</p><p>Pay careful attention to polarity. &nbsp;The main power slots on the battery are marked. &nbsp;You can ignore the 3 smaller intermediate terminals.</p><p>Use at your own risk, these batteries carry a lot of energy.</p><p>&nbsp;</p><p>Edit: updated plug body to get better alignment of metal tabs to the battery slots.</p>