Battery dead after a 2 weeks in the garage

[dmairspotter]

My car has been in the garage in Maine all winter. I start it up about every 2-3 weeks. No battery maintainer, and as far as I know it's the original battery.

When I do start the car, I make sure to drive it around town until it reaches normal running temperature. This also gives the battery time to regain the charge it lost to starting the engine. If you just start the car and let it idle for a few minutes, I doubt the battery is getting recharged.

I would suspect a parasitic load on your battery somewhere.

YMMV

[keysguy]

I have found my battery only last about two weeks sometimes too. I had to get a battery maintainer. The reason I think my battery life is so short is that I only put about 20 miles a week on my car. I don't think with using the alarm and only driving it for 20 miles a week is enough to keep the battery charged. The one I use is from Battery Tender. http://batterytender.com/products/automotive/battery-tender-plus-high-efficiency.html

I plug it into the cigarette lighter/ accessory outlet and run the cord outside the door then shut the car door. I put the charger/maintainer on a brick under the car and run the extension cord to it.

[kindlethespirit]

My S has been parked since October here in PA. I haven't used a tender and typically I start the car once a month and allow it to run for 30 minutes to get the oil hot.

I've never had any issue with a flat battery even when we've had minus zero temps for weeks at a time.

On another note, Keysguy---I have a house in K.W, but haven't been able to get there this winter. How long have you been in the Keys?