I rebuilt my gimbal for mobile use.
On top as a handgrip is a 11.1V battery.
It works really well beside the fact that it translates all movements that it gets from outside and that it compensates to a left/right shift
It compensates two axis but the remaining axis jellos the gopro 🙂
Not really a problem in a linear movement like flying, but when you use it as a hand-gimbal its suboptimal.