Still seems like a trolley bus at least could get out of such a bind with a very small battery that lasts like 3-5 minutes. It could then recharge said battery

Still seems like a trolley bus at least could get out of such a bind with a very small battery that lasts like 3-5 minutes. It could then recharge said battery when it reconnects. That way it won't have to haul ten tons of flammable batteries everywhere it goes.