![]() But it would mean selling a lot more M18 batteries, though, since they have higher capacities and can handle higher wattage draws. I’m surprised Milwaukee doesn’t already already make one, though it does mean selling a lot fewer M12 batteries if they did. ![]() Though that brings up another idea for which parts are already on the way as I write this: an M18 to M12 battery adapter. Since a lot of us have USB type-C portable chargers anymore, and even the Milwaukee Top-Off becomes an option for powering M12 items from an M18 battery. While I built this partly as a curiosity, I can definitely see a use case for this. And the USB type-C cable is, obviously, from Anker. It works reasonably well, though it seems to inexplicably lose its charge. The portable charger is a 65W portable charger from Baseus. Without the lid, the battery shell should sit flat on your drill press platform. And I highly recommend using a drill press if you have one. Just drill out the bottom through the center divot (see below), though I’d recommend using a 1/4″ drill bit to start the hole. You’ll need a step bit that has a 1″ step. The panel mount plug I linked is keystone size, so you’re going to be drilling a pretty sizeable hole in the bottom of the battery shell. Keep to light power devices like lights and the aforementioned borescope and you should be fine. And absolutely do not use this with the AXIS jacket. But it definitely should NOT be used with anything with a motor, since they have a surge current when powering on. It works fine with my borescope, which draws only a couple watts of power. So this adapter is best suited for the lighter M12 devices. 18650 cells can do 10A typically without issue, making Milwaukee’s M12 capable of over 100W of power delivery. The USB type-C power boards will do 3A (36W) without issue with any USB type-C charging cable, but needs an “active” USB type-C cable for up 5A (60W). Milwaukee M12 3-cell replacement battery shell.12V USB-C PD power module (these are almost always sold in multi-packs).Ideal is having an M12 battery shell with some kind of 12V input on the bottom. And while that would work, it’s obviously far from ideal. So how to do that? The simplest solution is soldering a couple spade connectors to the power board and just plugging it up that way. Well one idea I had is using them to power a Milwaukee M12 device. And I’ve used them in testing to power a light strip and I’ve got other ideas in mind for using them. ![]() In figuring out a portable light wand, I discovered some very small USB type-C power boards, one specifically locked at 12V.
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