I had no luck running a powerbank with my 6 or 7, they kept resetting, but that was possibly my set up at fault as I know others do run powerbanks to them. I run a Hero 5 Session with a powerbank though, and I velcro it to the back of my helmet. You could put it in a pocket, but then you'd be attached to your mic adaptor and movement could cause issues when you turn your head etc