On Mon, 26 Feb 2007 23:13:29 GMT, wrote:


wrote in message
ups.com...
On Feb 26, 4:19?pm, "N8N" wrote:
On Feb 26, 11:47 am, Bennett Price
wrote:



(Long thread of helpful hints snipped)

Thanks, guys. Don't worry, I realize I'm not an EE (though I do have access
to one), so no dangerous acid-based homebrew kludges. I am 99% certain there
is no mechanical faults in the circuits, since the units worked when stored
away, and the odds of the same fault in 2 units not in use is slim to none.

My first thought was that the sealed batteries crapped out, and several of
you seem to support that. No time this month, but when I get a slow day,
I'll open the units up, using the instructions from vendor website, and see
if any of the supply houses in town have drop-in replacements for less than
half what it would cost to get new UPS units from Sam's Club or mail order.

Based on prior experience in my day and side jobs, I predict these are 'not
economical to repair, based on expected remaining lifespan'. So one question
remains- how do I legally get rid of old ones? 'Free' pile in spring garage
sale? Keep watching ad paper for county HazMat day?

aem sends....

I bought a new 900 ups and it would not stay on when I first applied
power. I figured the batteries were drawing too much juice and
shutting down the whole system.

I hooked it (the battery) up to my automobile battery charger and
gave the battery a quick charge and it has been going fine for 3
months.

My point is that the UPS may need a little help getting the batteries
to a satisfactory state so it can start charging them.

All 3 of my UPS charges uses a 12 volt lead cell. On two of them, I
have connected up sears die hard batteries and thrown away the little
batteries it shipped with. When power goes with ice storms or
hurricanes, I can keep computing for up to 12 hours.