Battery Life- keep being told use it or lose it

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  • 4 Post By dkozloski
Cadillac STS Forum - 2005 through 2012 Discussion, Battery Life- keep being told use it or lose it in Past Cadillac Vehicle Discussion; Disappointed in battery life 2006 STS. Now on my third battery. Purchased as investment as work from home. Every winter ...
  1. #1
    Fuentes014 is offline Cadillac Owners Member
    Automobile(s): STS 2006
    Join Date
    Mar 2012
    Mass, USA

    Thumbs downBattery Life- keep being told use it or lose it

    Disappointed in battery life 2006 STS. Now on my third battery. Purchased as investment as work from home. Every winter I have to jump start, as if sits for more than three days in the cold, will not start. Keep being told it is due to the electronics in STS. Need to buy a battery charger and trickly charge the car. However wife vehicle has no problems and my Silverado truck is parked almost all winter (unless 4X4 is needed for Snow) with no issues. Have others experianced the same issues... so much for buying an investment

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  3. #2
    dkozloski's Avatar
    dkozloski is online now Cadillac Owners 10000+ Posts
    Automobile(s): 2006 STS V8 AWD, '95 Ford Ranger
    Join Date
    Jul 2004
    Fairbanks, Ak

    Re: Battery Life- keep being told use it or lose it

    You've got a problem. I can let my '06 V-8 STS4 sit for four or five days or longer outside at 20 below zero or colder and it'll start just fine. In fact in six years of 50 below zero winters it has NEVER failed to start. Get a smart mechanic with a clamp-on ammeter to check it out for parasitic drains.

    That being said, anybody will tell you that a car is the worst possible investment. For all practical purposes a five year old or older car has no value. If you don't believe me, try to borrow money against it.
    malatu, malatu, scott9001 and 1 others like this.
    Don't mess with Binky Bear!

  4. #3
    scott9001 is offline Cadillac Owners Fanatic
    Automobile(s): 2005 sts N* 1965 coupe deville
    Join Date
    Aug 2011

    Re: Battery Life- keep being told use it or lose it

    ^^^^^^ soo true! this car is porbably one of the worst investmens you have ever made lol geeze even rrsp's do better latley then vehicles holding there value

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  6. #4
    ddalder's Avatar
    ddalder is offline Cadillac Owners Connoisseur
    Automobile(s): 08 STS-4 N* 1SG, 08 DTS Luxury II, 04 Bonneville GXP N*
    Join Date
    Aug 2008

    Re: Battery Life- keep being told use it or lose it

    Replacing batteries is okay, but have you ever had the charging system tested?

    One of the first things a shop should look at is whether there is any aftermarket electronics in the car (given your circumstances). I suppose it's possible, but I really can't see you getting three bad batteries in a row, unless you're buying some that are incredibly cheap. Are there any non-OE components installed?

  7. #5
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
    Automobile(s): 2006 STS4 V8 1SG & 2007 STS V8 1SE
    Join Date
    Jun 2008
    Cedarburg, WI

    Re: Battery Life- keep being told use it or lose it

    Cars aren't invetments unless they are clasics. As much as I love my STS, it will never be a classic. What it is, is, the least expensive luxury/performance touring sedan avaialable in 2008.

    As far as batteries are concerned, conventional lead/acid batteries should always be kept fully charged; they belong in daily drivers. I got over 8 years out of the OEM 'Freedom' battery in my Roadmaster and my early 2006 STS is still starting every day.

    I've already had to replace my wife's battery because her STS was a rental that spent long periods on the Hertz lot between charges. Wet cell batteries 'hate' discharge/charge cycles. Five year life is actually good. Only modern dry batteries 'like' to be exercized (i.e power cycled). And their characteristics don't match with automotive applications. A NiCad performs best when 95% discharged between full recharges. Lithium ION are supposed to 'cure' battery 'memory' but all batteries have huge parasiitic (SP?) losses.

    I'm soon to buy another Optima 78 (sans top posts) to replace my 78-month-old Delco.

    PS: These cars are too much fun to drive to leave in a garage.

  8. #6
    rnkath08's Avatar
    rnkath08 is offline Cadillac Owners Fanatic
    Automobile(s): 2006 STS4 v8
    Join Date
    Apr 2009
    upstate ny

    Re: Battery Life- keep being told use it or lose it

    I winter mine every year, use a trickle charger (battery tender type) that only feeds it when it needs. It even is "girly" as I just have to plug it into the cigarette lighter and an outlet. Simple.....and it was only $20 at the battery shop!

  9. #7
    mckellyb is offline Cadillac Owners Enthusiast
    Automobile(s): 2005 STS N*, 1SF, 144K mi.
    Join Date
    Apr 2011
    Fort Worth

    Re: Battery Life- keep being told use it or lose it

    Caution, battery info gained over the course of 20 years follows.

    1. Unless it's an Optima, or another truly sealed battery (like UPS-size batteries), "Maintenance Free" merely means the manufacturer put stickers over the fill caps. They're there, trust me.

    2. 'Maintenance free' batteries still lose water when charged/hot.

    3. You can remove the stickers to access the caps. Add distilled water only. Check it every couple of months. You'll lose more water if the battery runs boils off while charging.

    4. Periodic desulfation really does work. I didn't believe it, initially, but after buying a motorhome which has six batteries, two monster engine batteries and four quite large 6V golf cart batteries...I determined it was in my best interest to keep them all in the best shape possible. I had to replace the four "house" batteries about a month after purchase 'cause the previous owner never added water to them. This wasn't inexpensive.

    5. The 'chassis' batteries were 'maintenance free', and lasted 10 years, after I peeled off the stickers and kept an eye on the water level. Both had a plate shake loose, internally, and knowing where I've had this machine, I'm shocked they lasted as long as they did. Several hundred miles of dirt roads will do that. In fact, one of the engine batteries may be original. I haven't looked at that machine in a few months. It's time to, obviously.

    6. The four 6V 'house' batteries turn ten years old this year, and they're still fine. Keeping a trickle charger on them, and putting a desulfator on them for about a week every six months has saved me a TON of money. Literally, several hundred dollars, even after the $225, or whatever it was, the desulfator cost me.

    Oh, and my wife's RX300's OEM battery lasted 8 years with proper car. 8 years...on a battery which was in the car when new, and we didn't own it until it was about two years old.

    I believe part of the problems we're seeing is corporations maximizing profit by cutting back on quality. Make it last as long as the warranty is, and not a day longer. Automotive batteries see a truly brutal environment for what they are.

    If the case is bulging, then the battery has sulfated to a significant degree. Google 'battery sulfation'. It happens only when the battery is not fully charged, which is why trickle chargers are good. Even bulging batteries can be somewhat reclaimed by desulfation. Chances are good you won't get them back 100%, but it can tide you over for a good while.

    edit: when I was looking at STSs, I found many a Carfax with multiple battery replacements. It could be it is just barely undersized.

  10. #8
    tomm's Avatar
    tomm is offline Cadillac Owners Connoisseur
    Automobile(s): 2014 Cadillac CTS VSport
    Join Date
    Feb 2005
    New Jersey

    Re: Battery Life- keep being told use it or lose it

    I have replaced my battery only once. Before replacing it did get to the point that if I did not start it in 1-2 days I would need a boost. Replaced the battery and I went almost 10 days during a vacation and it started right up. The batteries however are damn expensive. I spent over $250 on the replacement.

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