Power tool companies have discovered USB-C — and DeWalt's two-way charger sounds awesome
https://www.theverge.com/2022/1/27/22905482/dewalt-ryobi-milwaukee-usb-c-power-tool-batteries

I don't get a buzz from these, but I have toyed with the idea of using my 18v tool batteries as a stand-alone remote power pack.

>>18v tool batteries as a stand-alone remote power pack

My brother-in-law upgraded my nephew's PowerWheels jeep from either the 6v or 12v battery it was running with a couple 18v batteries. That thing can MOVE now! The kid is always trucking around the yard in that thing, hooking up trailers, building obstacle courses, etc.