I have two car type batteries that I have in my basement. One is to
start my generator and the other is a spare. I charge them once a week
at 1.5A for three hours. I check the voltage before charging. One of
them usually reads 12.60 volts and the other 12.76 volts. I checked the
acid level on the 12.76 volt one and it is OK. Why would it read so
altough they are all lead acid, resting voltages vary a little
depending on what chemical besides lead were used. car batteries are
actuall complex designs.
the more important question is what are their load test voltage, after
500 amps at 30 seconds.
lead acid batteries have a realtively short but robust life.
Sounds normal, especially if you're measuring the voltage immediately
after charging. If you wait a day after charging, I'll bet the higher
one drops down closer to 12.6.
If it were me, I'd get a battery tender connected so I didn't have to
charge them periodically.
On Mar 15, 7:21 pm, email@example.com (---MIKE---) wrote:
You dont need but to charge them every few months , charge them to
13.3v not 12.76 , a discharged batter is ruined quickly by sulfation.
12.76 is maybe 80% charged. Some chargers can be adjusted if you open
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