Varley do not offer advice for deeply discharged batteries but Odyssey do.
Both batteries are the same technology so you could try the advice in the
attached files. Basically, it involves connecting a full charged battery to
the terminals of the discharged battery for a short period to kick start it
so that an intelligent charger can then start the charge cycle. I would not
have risked this if it had not been recommended by a battery manufacturer!
Regards
Brian Davies
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of rparigoris
Sent: 14 June 2014 22:02
Subject: Europa-List: Re: Red Top Battery (Varley aka DMS) low voltage
--> <rparigor@suffolk.lib.ny.us>
Hi John
You need a "Dumb" Charger if you have any chance at all. If you have or can
find a constant charger that outputs between 250 and 750 miliAmps.
Let it run until you get to 15.5 volts. With a 500 mA charger this will take
days and days if the battery has sulfided. It's possible the battery is
beyond bringing back to life, but the shorter the time you leave it dwell
below 12.5 volts, the worst off you are. By allowing the battery to dwell
above 14.4 volts and up to 15.5 volts at a very small current seems to do
very good things to break up any sulfation. Monitor often the voltage during
this process. Listen for excess activity with your ear on the battery over
14.4 volts. I have used 250 to 500mA on 18aH batteries, 1,000 mAs seemed a
bit too much, I'm thinking 750mA may be OK?
Let us know how you make out.
Ron P.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=424838#424838
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