dan jacobsen

I have had to replace the battery in my 1998 3.2 twice in about a year and a half now. I replaced a dead one with a $70 one from AutoZone in Feb 2006. It is now bad. I took it to AutoZone. They tested it, found it bad, and gave me a new one--good service here by the way! I am thinking that maybe the way the 3.2 runs the radiator fan on the battery after the car is turned off, that maybe this car needs a bit better battery??? Has anyone gone with a higher quality battery for their car like an Interstate or other similar "more expensive" battery? If yes, was it worth it? Thanks in advance!!