Batteries are one of those things that I normally keep up on and buy the premium ones and replace them every few years. Even at that I always carry a set of jumper cables in the back of the Jeep.

This didn't happen to me, but afew years ago I was working at a place that processed credit card payments for utility companies. Lots of expensive suits wandered around.

One night I was working late and the site VP comes in to our suite asking if anyone had jumper cables. Sure enough I did. Turns out a visiting senior VP of the company had left his lights on in his rental and needed to get to the airport to fly home.

Here I am with a beat up, muddy, jeep jumping a lexus rental for this VP. I didn't know who the guy was because we constantly had suits wandering around. I was just trying to be a nice guy. Afew weeks later I suddenly got a small "merit" raise that was unexpected.

That little booster would be alot more handy to carry around than a set of jumper cables.