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Date:	Mon, 1 Apr 2002 11:49:38 PST7
From:	Steve Carter <scarter@vcnet.com >
Reply-To:	scoug-general@scoug.com
To:	scoug-general@scoug.com
Subject:	SCOUG-General: OT UPS/charger babble

Content Type: text/plain

Oops!

(This message was directed at Peter, but was wrongly
posted to this list (largely because I'm an idiot)).

Explanation:
We've been looking for an inexpensive way to keep
12V UPS batteries charged up _without_ overcharging.
Seems like the cheapie 12Vdc (11V) wall-wart power
supplies used on so many appliances these days are
just the ticket. Not the fancy regulated ones, but
the simple transformer/rectifier models like one sees
so often at swap meets and flea markets.

A current capacity of 0.20-0.50A is plenty adequate to
keep a gel-cell battery topped-off. You can even connect
up several batteries in parallel and use one wall-wart
as a charger for all -- as long as you're not in a hurry
to charge anything. It takes my little wall-wart two
weeks (!) to completely charge the monster (60-lb) 100A-hr
UPS battery I use for HAM radio backup, but about a day
for my 500VA computer UPS battery.

[Everyone should have a UPS -- don't you? ]

Sorry for the OT babble ....

++++++++++++++++++++++
On 4/01/2, I wrote, in part:
subj. was: Re: SCOUG-General: New toy for Peter
>
>Your wall-wart battery-charger power supply is now
>in a desk drawer in Montrose.
>
>I found some 11Vdc, 0.35A wall-warts branded PhoneMmate that
>do the "trick" nicely. I have several others in addition
>to the one I'm using currently. This one's yours.
>==========================================

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