You never know when a battery will die on you. In my experience, I've driven cars that started with just one click in the morning and by lunch time when I want to drive out for lunch, it's dead. In these cases, I just call motolite. Though their prices are dearer, the convenience of a person coming to install your battery within an hour is great! I don't know how many times I've had to call them through the years but I'm happy that the service is available when you need it. The worst that can happen to you is if you go out at night to party, get drunk, take a girl back to your car and find that your car won't start.