?? for heart monitor you just do what the mytrek does. you plug the darned thing in (again MOST people do not need over 5 hours no matter what you think you are an extreme exception if you need more than 5 hours)
for everything else you MOUNT it to the bike so you do it just like you do it now with a cycle computer. you run sensors to a base unit and that unit has the battery.
this is not complex. I don't want to get nit picky argumentative about this. it can be done and it can be done cheaply. I have to assume they just don't see enough of a profit in doing it or a lack of market (again lack of profit)
because the tech is readily available. the wahoo don't count they went after the i market.