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what voltage is lower limit for stored battery?

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Posted by jack on August 27, 2009, 1:18 pm

what is the lower limit for an otherwise perfect lead-acid battery when it
should be
charged, if stored for an extended time?

same question for a sealed AGM battery.

normally, I've checked both once a month and if voltage is below 12.5, connected
trickle charger for a day or two.

Posted by Scott Dorsey on August 27, 2009, 1:53 pm

should be

connected a

If it's a lead-acid battery, drain it and store it dry, then refill it when
you need it.

If it's a sealed battery, use a battery tender on it.
"C'est un Nagra.  C'est suisse, et tres, tres precis."

Posted by vaughn on August 27, 2009, 2:05 pm

Battery Tender gets my vote.  http://www.batterytender.com/   Very good stuff
(but not cheap)

Harbor Freight has a cheap version that has also given me good service.
Under $0 and often on sale for much less than that!


Posted by jack on August 27, 2009, 2:28 pm

I have this unit
http://www.navstore.com/detail.aspx?ID 16

Posted by vaughn on August 27, 2009, 2:46 pm

That one should be fine (it may even be a rebranded Battery Tender).  Just
connect it to your battery and forget about it.  There is no particular need
to disconnect it as you should for any "dumb" charger.


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