Probably the funniest and random idea yet TOMY Trains

Hey-- This just hit my mind!
What if one of your engine's batteries are dead, Then instead of picking it up and just putting new ones in right away, Load some up into a functioning engine with a troublesome truck, And then get that engine to run to the broken down one, THEN Open it up and use the delivered batteries!

It could be a more fun way to fix engines.