Our favorite XLR is the standard for charging wheelchairs and scooters.
Now that you mention yes,,, the mobility scooter I repaired multiple times had the popular XLR for that one connection... That XLR being indexed was useful to maintain DC polarity. All the rest of the internal wiring used conventional amp/molex type crimp and poke connectors.
For TMI One of the sundry repairs I made was repairing the battery charger when it stopped charging. I didn't have a schematic. Long story short I found a passive 1/4W resistor that went rogue*** (way high resistance). I replaced it with one I had in my parts bin that was close enough to work...
JR
*** In decades of repairing gear I never saw a resistor fail that way without being stressed somehow. This one was just too cheap to keep working. Apparently it worked when new.