Wendy sees Tony fretting over his personal CD player.
T:This cursed CD player! The batteries are running out again.
W:Don't you have any more?
T:Yeah, but that's not the point. It's costing me a fortune to run this thing all day.
W:Well, maybe that's the problem: You shouldn't use batteries continuously. We covered this in physics, remember?
T:What? But everyone knows that if you use battery-powered devices intermittently they use more energy.
W:Everyone thinks that, but, as a matter of fact, with batteries, it's better to give them a break occasionally.
T:But how come? It doesn't make sense.
W:Inside a battery are two liquid substances. Power is produced when these two react. But they actually move from one side to another while they're reacting.
T:Oh, yeah! What you're saying does ring a bell. That chemical reaction is greater when the substances are in their original positions, right?
W:You got it! So a rest period gives the ingredients a chance to equalize.
T:And if the liquids go back toswheresthey're supposed to be, then the battery can produce more power; is that it?
W:Precisely. You're a genius.
T:Off and on, I am.
W: And more power to you because of it!
---by Sean McCormack