For the first time in my life, I'm being smart with my car

And replacing my car battery BEFORE it dies and leaves me stranded. Now, I have to spend $110 on a tow. NO THANKS!!

Typically what happens is one random day as I'm driving, poof, car battery dies. It's a 4 year old battery. But instead of finding out while I'm driving, I figure I'll take care of it now so I'm not in that situation.