Battery problem
#1
Battery problem
After my cars sits for 3 days I have a dead battery condition. Walmart claims the battery is good.
Here is what I found. After charging the battery it has 12.51 volts. When running at idle the battery reads over 14 volts. The drain is 0.02 Amps which I suspect is fine.
I'm concluding that the battery is in fact bad. There is just one way that I can think of where the battery is good....
Is it possible that while the car is sitting that the drain jumps from .02A to a higher draw?
Thanks,
Jomo
Here is what I found. After charging the battery it has 12.51 volts. When running at idle the battery reads over 14 volts. The drain is 0.02 Amps which I suspect is fine.
I'm concluding that the battery is in fact bad. There is just one way that I can think of where the battery is good....
Is it possible that while the car is sitting that the drain jumps from .02A to a higher draw?
Thanks,
Jomo
Last edited by jomo; 10-09-2017 at 11:35 AM.
#2
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jomo (10-10-2017)
#3
Good test is to remove the battery from the car when charged, let it sit for 72 hours alone and look at the voltage drop. If your getting 12.7 down to 12.4v in three days or something then clearly a bad battery. I have a second car that sat for 4 weeks with a new battery, started first time on the key.
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jomo (10-10-2017)
#4
Good test is to remove the battery from the car when charged, let it sit for 72 hours alone and look at the voltage drop. If your getting 12.7 down to 12.4v in three days or something then clearly a bad battery. I have a second car that sat for 4 weeks with a new battery, started first time on the key.
Thanks!
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Dealersadvocate (06-24-2020)
#5
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