Gristle I find that interesting
I would have thought as you did that there would be a straight connection between the outlet and the battery with no interference from the USB.
I could no resist I would open that sucker up and have a look inside.
I will have a look through my electrical junk bag to see if I have anything similar that I can test, check and open up.
Some of the 19 rides in my shed
2014 V2, Snoopy
2009 Wee, Pumbaa the pig
WR450F, The Blue Postie Bike
YZ250N smoker with rego, Stinky.
Yamaha MT09 (FZ09), The Scud missile.
Club Lead not Club Med.
He with the most toys wins.
Out of my depth in a puddle.
Live life on the edge you will see more that way.
Ridding a motorcycle keeps things in balance.
At the end of each trail and at the end of each day history is made.