Re: Earlier today my 2013 with only 14,000 miles showed 15V, and often shows 14.5, so it's likely ok. |  |  |
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| battery killed by excessive charging voltage? Mike Tarter - Sunday, 16 December, 2012, at 1:43:29 pm |
Hello all,
My 02 Boxster declined to crank up the other day (was driven to a social event). Got home with a jump start, so I figured the alternator was working, just the battery dying. Did diagnosis at home - battery was replaced on June 2010 and was a bit down on electrolyte, but not seriously. Checked idle charging voltage at the battery - it is 14.5 volts. Hmm, I was expecting more like 13.6 to 13.8. Could I have an alternator that is snuffing the battery? Come to think of it - when radio is on AM, and signal is weak, I hear a RPM dependent squeal from the radio. I'm thinking maybe a bad regulator? Advice from this erudite community invited...
Cheers!
My 02 Boxster declined to crank up the other day (was driven to a social event). Got home with a jump start, so I figured the alternator was working, just the battery dying. Did diagnosis at home - battery was replaced on June 2010 and was a bit down on electrolyte, but not seriously. Checked idle charging voltage at the battery - it is 14.5 volts. Hmm, I was expecting more like 13.6 to 13.8. Could I have an alternator that is snuffing the battery? Come to think of it - when radio is on AM, and signal is weak, I hear a RPM dependent squeal from the radio. I'm thinking maybe a bad regulator? Advice from this erudite community invited...
Cheers!
Laz - Sunday, 16 December, 2012, at 2:28:08 pm |
| Re: Earlier today my 2013 with only 14,000 miles showed 15V, and often shows 14.5, so it's likely ok. Lawdevil & CURVN8R - Sunday, 16 December, 2012, at 2:42:50 pm |
| Re: Earlier today my 2013 with only 14,000 miles showed 15V, and often shows 14.5, so it's likely ok. Mike Tarter - Sunday, 16 December, 2012, at 3:20:47 pm |
| I wish i could give you a more dfinitive answer, but here's what i do know grant - Sunday, 16 December, 2012, at 8:03:54 pm |
1. Over-voltage *can* kill a battery
2. Typical regulated charging voltage in a boxster is about 13.7V
3. However, in my Audi its always 14V+
4. Since batteries are used across multiple vehicles, they must sustain the highest, not the voltage of your particular make and model. Furthermore, the addition 0.8V is only 0.13V per cell - pretty minor stuff in the world of salt and lead and acid.
Soooooo i don't think that was the case, but i could be wrong.
Let us all know what you find out,
Grant
Grant
gee-lenahan-at-gee-mail-dot-com
2. Typical regulated charging voltage in a boxster is about 13.7V
3. However, in my Audi its always 14V+
4. Since batteries are used across multiple vehicles, they must sustain the highest, not the voltage of your particular make and model. Furthermore, the addition 0.8V is only 0.13V per cell - pretty minor stuff in the world of salt and lead and acid.
Soooooo i don't think that was the case, but i could be wrong.
Let us all know what you find out,
Grant
Grant
gee-lenahan-at-gee-mail-dot-com
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