Lew:
Originally Posted by BoilerUpXFire
PLEASE READ THIS.
First off, even when a battery is testing ok, if it is more than 3-4 years old, replace it, these cars are VERY sensitive to voltage irregularities.
Listen to him!
This board is FULL of stories of people suddenly being stranded due to NOTHING more than a battery. I had one that would turn the engine over, but as soon as the engine started, it would die. The car was towed to a garage ($80 for the tow) and they worked on the car an hour ($90) - and it turned out to be nothing more than a battery THAT TESTED FINE. (THis was in a Dodge Durango, but the point still applies.)
When the battery reaches 3 to 4 years of age, REPLACE IT! It's the INEXPENSIVE way out of a LOT of potential problems. I replaced mine over a year ago just because it was the original battery from 2005.