Weird idea
I don't know about you guys but they came out with a flashlight to where all you have to do is shake it and turn it on without using batteries. Wouldn't that be kinda cool just to shake your truck/car then set it down without recharging batteries or buying new ones?
You don't really have to worry about shaking it every 5 seconds if you keep jumping or running the truck because all that motion would keep it going!
Well I just had that idea and thought it would be cool. I haven't got a real good look at the flashlight so I don't know if that would be even possible but it might be worth a try.