Since November 2023, my '98 (234,000 miles, stock except for radio) has killed three batteries and I just can't figure out what is happening. By killing the battery, I'm saying that the battery dies after I turn off the car and it won't restart, and when I bring the battery to Advanced Auto to test it, they tell me it's dead and cannot hold a charge. I've had them recharge it, and then I try to restart it, but it will not even try to start. The last time it died, I noticed the ground wire to the frame was corroded, so I replaced the ground wire and the terminal clamp. I've also replaced the terminal clamp on the positive terminal. Any ideas what to try next? I'm afraid to put another new battery on it now because it killed the last one in just a couple days. Appreciate any advice.

 

About the only way I think the battery could get killed (not just run flat) in that time frame would be through over charging? Got a multimeter? What's the voltage at the battery when the engine is revved up to 2000-2500 RPM?