: Battery went down after sitting for two weeks



Bertbart
06-20-12, 08:48 PM
My 2005 CTS V sits in a climate controlled garage. Well it sat for two weeks and when I went to crank it to take a buddy to lunch it would not turn over or even click the solenoid. I put it on a smart charger and it appears to be taking a charge. I've checked for interior lights left on and there is nothing on. I called a mechanic friend and he said the computer will pull the battery down if the car isn't driven regularly. I have other computer vehicles that sit for longer periods of time and they have no problem cranking. My mechanic buddy says I need to buy a "battery tender" and keep it plugged in when not using the car. That sounds like a bubble gum and tape fix.

Anyone have an idea of what could be causing the battery drain?

darkman
06-20-12, 09:41 PM
There are times I do not start my V for 2 weeks or so and my battery is not depleted. It could be a weak battery or a parasitic drain - see attachments to this previous post :http://www.cadillacforums.com/forums/2004-2007-cadillac-cts-v-performance/254489-p0507-cam-install.html#post2897430

thebigjimsho
06-20-12, 10:11 PM
Do you take out the V for just a quick trip and then let it sit for 2 weeks?

I used to store my V1 in the winter. One winter, I went to see it and start it. It had sat for 4+ months and fired right up. When I went back less than 3 weeks later, it wouldn't crank at all. When you start it, you need to drive it.

A battery tender is not a bubble gum and tape fix. It's a needed tool for cars that sit for awhile. Or disconnect the battery...

alradco
06-21-12, 01:27 AM
I think the life expectancy for a battery is about 5 years. You could test it to see if there's a drain.

Peter

P-Funk
06-21-12, 09:42 AM
If I let my car sit for more than 4 or 5 days without starting it, the battery will be dead. A couple years ago, I got a battery tender and hook it up whenever it is going to sit for a while and have had no problems since. It's inexpensive and works.

As for what is causing your drain, I don't know. I was told that having lojack (or similar product) on your car could cause your computer to wake up constantly which could drain it, but I don't really know.

rand49er
06-21-12, 09:47 AM
If that's the original battery, then I'm not surprised.

Stored my car for three months this past winter, and the OEM battery finally croaked ... after more than 7 years.

Skidmarcx
06-21-12, 10:24 AM
Yea if it is the original battery then it could be ready for replacement... Battery tender is not a bad idea... Disconnecting it works too

Cadillac Cust Svc
06-21-12, 02:14 PM
Any updates in your battery situation, Bertbart? If you'd like me to investigate anything further for you, don't hesitate to email me anytime at Katie_Lucille@gmexpert.com. As the community demonstrated, many different factors could be responsible for the drain, and I hope their feedback has been helpful!

Let us know how you're progressing!

Katie
Cadillac Customer Service

Bertbart
06-21-12, 03:31 PM
Any updates in your battery situation, Bertbart? If you'd like me to investigate anything further for you, don't hesitate to email me anytime at Katie_Lucille@gmexpert.com. As the community demonstrated, many different factors could be responsible for the drain, and I hope their feedback has been helpful!

Let us know how you're progressing!

Katie
Cadillac Customer Service
Thank you Katie for your concern.

Well he battery took a charge. I drove it 40 miles or so today. I'll be checking it for any voltage drop over the next few days and see what happens. If there is a significant drop then I'll test for parasitic drain with a meter.

Thank you to all who took their valuable time to answer.

Bert

mberisha
06-21-12, 05:09 PM
I had the same problem as you...give the battery a FULL charge with a good charger...and see if you still run into the same problem.....

rand49er
06-21-12, 10:14 PM
... valuable time ...That'll be $100, please. :)

GDPossehl
06-22-12, 04:37 PM
I thought dealer rates were $120?