I agree. Batteries are the worst part of the setup to me, with diy options being terrible on weight to power density.
Other super solid option. Also a portable power storage and a portable motor is super useful if you're creative with it.
Pump water, winch this to places (food storage hanging in a tree, packs up steep or vertical travel), run power tools (saws, routers, etc) or run a fan.
Kind of wonder what a attachment system for a bike motor looks for this tbh, but some of these only make sense with the motor and not just pedal power.
The smart crap is pennies on the dollar compared to rest of it.