I did it once in the Alps this year. I'd forgotten to charge before I set off and plugged in the bar-end junction box when i had a boring road section so I wouldn't forget later (it was hot as hell, all I wanted was a beer and a shower).
I specifically didn't get one of those bar end junctions on the Mason because I thought "that's gonna mean dangling a cable way over to the end of the bars while riding when I forget to charge"
I did it once in the Alps this year. I'd forgotten to charge before I set off and plugged in the bar-end junction box when i had a boring road section so I wouldn't forget later (it was hot as hell, all I wanted was a beer and a shower).