Well removing the analogue input will never be the case as far as I am concerned as well.
For the time being the strategy is V1 only analogue input, V2 analogue and USB inputs. They will co-exist (for at least as long as I can supply V1 units).
Indeed the power consumption with digital input is a problem.
A solution might indeed be as Francis suggested a desktop with fixed mains power input.
My main priority is now to get V2 onto the market. Only then I will take next steps.
I do appreciate you all thinking with me very much !!!!!
Rgds. Hans