[Shotimes] Battery/Alternator/Voltage question

[sho2go]

A fully charged wet cell has a voltage of 2.2V.  This translates to 13.2V
for a 6-cell battery.  While charging, typically voltages are 13.8-14.4V,
depending on load.  After sitting out overnight, with some age, a car
battery may be around 11V, temperature dependent.
Mike

----- Original Message -----
From: "Steve Tatro" <stevetatro_shotimes@att.net>
To: "SHOtimes" <shotimes@autox.team.net>
Sent: Monday, December 23, 2002 10:02 AM
Subject: [Shotimes] Battery/Alternator/Voltage question


> What's up.
>
> Got a stupid question, actually more than one.  What kind of VDC should
> I get from my battery, with the car off?  I measured it after driving
> around and it was 12.6V.  Also, what should the voltage be with the car
> running?  I measured 13.5V.  Also, again, what voltage should I expect
> when I go out to my car today after it's sat out in the cold for 10
> hours?
>
> What I'm trying to figure out here is if there's a simple way to
> diagnose if the battery is good or going bad, and the same regarding the
> alternator.  I'm assuming if it sits all day the voltage will drop, and
> if it drops too much then my battery may not be holding a charge
> properly.  Also, if the voltage measured is too low with the car
> running, do I possibly need an alternator rebuild?
>
> Anyone?
>
> Thanks as usual.
>
> Steve Tatro
> Red/Black '93 with 164k miles
> Cincinnati, Ohio
> www.picturetrail.com/stevetatro
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