UnityDevice

I bought some hp mini PCs a while ago and they had the 3 pin design. As I understand it the third pin communicates the power output of the supply, so the device can either reject the supply or work in a lower power mode. Luckily though they just use a simple resistor to do the communication, so the fix was to just solder in a resistor on the device side, and then I could use an ordinary laptop supply (with the right connector adapter).

Dell is much worse here. As far as I know their devices use a serial protocol on the third pin, and so it’s much harder to bypass it.

current property nonsense

You do realise that by using usb-c in this way, you’d be creating a proprietary connector, because there’s a lot more to usb than just the shape of the plug?

Not to mention that it would probably fail pretty quickly as the contact resistance is too high to handle the currents of a power tool. Compare a connector people usually use for batteries like an xt30/xt60 to a tiny usb-c one and you’ll see what I mean.

If the goal is to make it so you can buy any brand battery and use it with any brand tool, I’d look into making contact adapters instead.