Bad Battery?

[lakwo]

I have a 2001 buick century. About a year ago I started having problems with what seemed like a bad battery. I'd be driving the car fine, pull into a gas station to gas up. When I went to restart the car it was dead. I got a boost and as soon as I was hooked up to the other car, mine started right up. The next day I went to buy a new battery and the technician tested mine before I bought a new one. He said my battery was fine. This has happened a couple of times. The last time was when I went to gas up again. This time I had the ignition on but not running so I could gauge how much gas I was putting in. After I finished, my battery was dead once again. And yet again I had my battery tested only to tell me that my battery is fine. I can't think of anything on my car that continuously needs juice while its not running. What could be causing this problem?

[BNaylor]

You could have a parasitic drain possibly in the charging system, starter circuits, ignition circuits, body control, powertrain control or any of the accessory circuits causing the battery to drain.

[jdl]

Originally Posted by lakwo

I have a 2001 buick century. About a year ago I started having problems with what seemed like a bad battery. I'd be driving the car fine, pull into a gas station to gas up. When I went to restart the car it was dead. I got a boost and as soon as I was hooked up to the other car, mine started right up. The next day I went to buy a new battery and the technician tested mine before I bought a new one. He said my battery was fine. This has happened a couple of times. The last time was when I went to gas up again. This time I had the ignition on but not running so I could gauge how much gas I was putting in. After I finished, my battery was dead once again. And yet again I had my battery tested only to tell me that my battery is fine. I can't think of anything on my car that continuously needs juice while its not running. What could be causing this problem?

I know you said they tested the battery, but did they test the charging system? Your battery cables are clean and tight on both ends? If the battery and charging system are both good, I agree with the moderator, you may have a drain somewhere.