Question about 1993 Cadillac DeVille

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Replaced battery twice/dead cells

Battery keeps getting a dread cell why/second battery in one year?

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  • Rico1057 Jan 26, 2009

    I havent found anything thats draining the battery,checked everythink.

  • Rico1057 Jan 26, 2009

    thanks I'll have to do that.

  • Rico1057 Jan 26, 2009


  • Marc Podeszek May 11, 2010

    somethings draining the battery/ do have anything that has not worked in awhile



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1. Most probably you need to check the alternator if it is providing enough charge, also all conatacts for deposition, alternator, battery clamps etc.
2. Also If you driving less then 20-30 minutes it is not enough for battery to fully recover it can discharge it. If charge goes below 10.5 it can damage the battery. Leaving your lights or other accessories on and fully discharging a car battery can ruin it due to 'cell reversal', especially if it is a sealed, wet Maintenance Free
type.Cell reversal is where one or more cells in the battery
actually change polarity.
3. Sulfation from water loss, undercharging, electrolyte
stratification, excessive temperatures or prolonged periods
of non-use account for approximately 85% of the deep cycle
and starting battery failures that are not used weekly,
vehicle charging systems based on driving habits (short
trips with high loads leaving the battery constantly
undercharged).Water loss can occur even in sealed "maintenance-free" batteries.
4. Finally If the alterantor is giving to much charge (high in ampers)
due to internal failure it also can shorten the lifetime of battery
Best way to go to Autozone store and have them check the battery charge and if the alternator gives enough charge
They do it for free
Good Luck

Posted on Jan 26, 2009

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Absolutely check the alternator the pull form the alternator or if you have to crank it a few times before it starts it could be the starter

Posted on Jan 26, 2009

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More then likely just a fluke on 2 batteries,but i would check the output on the alternator to make sure it is NOT over charging.

Posted on Jan 26, 2009

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With vent caps off, you will see 6 holes on the top of the battery. Each hole represents a series circuit, much like putting 2 AA batteries in a remote control to make the voltage 3 volts. Each cell is a multiple 2 volts. Place negative lead of multimeter on negative of battery, Next place positive lead inside battery cell until you are touching the acid. Going in sequence, each cell should give you a reading of 2,4,6,8,10,12 volts. If one cell doesn't give you a multiple of 2 volts, it is a "dead" cell and the battery will need to be replaced.

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