i think by the time they reach the age power rangers is aimed at they have developed rudimentary self preservation skills. but hey, im not a parent so i could be wrong

Battery-powered Batteries, maybe??

I think zordbuilder will make the mechas far more interseting. I had a ton of fun with the minpla I cant wait to get my hands on a ZB mecha from that line.

Might be possible, I could see them being a fair good size, making them with sounds in it. Maybe.

My guess is that the batteries will have a Zordbuilder port on one end and a plug on the other end so the arms can attach with stability. Pteragordon-Oh and the rest could easily have removable Zordbuilder arms as well, so I don't really see where people are seeing the two as incompatible. I do want to see BOA's solution for Gobusters though.

I honestly don't see the Batteries being included with the Zords. They'll find some way around that.

The easiest way to both have and not have batteries is to make a retractable zord builder plug come out from the mouths of the limb zords, and just paint (or most likely) cast them the correct color.