If Marty and Doc were on the same street but not in the same year, then would they be able to talk to each other on their radios? I don't think that it's possible because if the signal is coming from the past, then it technically does not exist in real time. However, I'm curious if someone has a different theory.
shareObviously not because Marty tries to talk to Doc when he gets zapped back to 1885 and the signal's dead.
shareThank you, HellFire. Yes, but the radio is damaged by the lightning.
shareOh sorry, is that why they put those big batteries on them in 3? It's been a while since I've seen them.
shareI figured they didn't have the proper sized battery and, like the time machine rebuild to get Marty back to 1885, they had to make do with what was available in 1955.
shareTheLonelyOne86, using batteries is a matter of everything or nothing. You can't operate an item on the wrong type and have limited workability.
shareI forgot that the radios appeared in part three. Maybe Doc found a way to fix the damaged one, or perhaps the problem at the end of this movie was simply that the high electricity destroyed the signal in the moment. If the unit had been ruined, then batteries would have been useless.
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