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Default storage battery question

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
high?


---MIKE---
In the White Mountains of New Hampshire
(44 15' N - Elevation 1580')


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On Mar 15, 7:21 pm, (---MIKE---) wrote:
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
high?

---MIKE---In the White Mountains of New Hampshire

(44 15' N - Elevation 1580')


You are concerned about a .16 v difference between the two?

JK
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Default storage battery question

On Mar 16, 5:58�am, "Joseph Meehan"
wrote:
� � Normal variance.

--
Joseph Meehan

�Dia 's Muire duit

"---MIKE---" wrote in message

...



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
high?


� � � � � � � � �---MIKE---
In the White Mountains of New Hampshire
(44� 15' �N - Elevation 1580')- Hide quoted text -


- Show quoted text -


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.
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Default storage battery question

On Mar 16, 6:58*am, "Joseph Meehan"
wrote:
* * Normal variance.

--
Joseph Meehan

*Dia 's Muire duit

"---MIKE---" wrote in message

...



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
high?


* * * * * * * * *---MIKE---
In the White Mountains of New Hampshire
(44 15' *N - Elevation 1580')- Hide quoted text -


- Show quoted text -


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.
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Default storage battery question

Trader4 wrote:

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.


This was measured a week after charging - just before charging


---MIKE---
In the White Mountains of New Hampshire
(44 15' N - Elevation 1580')




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Default storage battery question

On Mar 15, 7:21*pm, (---MIKE---) wrote:
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
high?

* * * * * * * * * ---MIKE---In the White Mountains of New Hampshire

* (44 15' *N - Elevation 1580')


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
them up.
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