In article
<1161742099.668941.225490@m7g2000cwm.googlegroups.com>,
> > In article
> > <1161372182.529083.309660@e3g2000cwe.googlegroups.com>,
[quoted text clipped - 22 lines]
> If you have 12.1 VDC on the battery at rest, then the battery is fully
> charged.
http://www.repairfaq.org/ELE/F_Car_Battery.html#CARBATTERY_009
(psssst... when they call 'em 12 volt batteries, they're lying)
> If you have 14.1 VDC on battery with engine running then the
> alternator is good.
Depends on the ambient temperature, not to mention that all
alternators have a voltage versus amperage specification.
> Put the volt meter on the battery at rest and have
> someone crank the engiine over while you read the voltage, it should
> not drop belwo about 11.0 VDC if the battery is holding a good charge.
Stupid me, here I've been using an AVR and a trans-conductance
tester all these years.