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RE: UPS batteries
- To: "'ukha_d@xxxxxxx'" <ukha_d@xxxxxxx>
- Subject: RE: UPS batteries
- From: "Steven Dickson" <sdickson@xxxxxxx>
- Date: Wed, 16 May 2001 08:52:21 +0100
- Delivered-to: rich@xxxxxxx
- Delivered-to: mailing list ukha_d@xxxxxxx
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
I've
got an old one of these APC UPS units as well - I acquired it from my old
employers as it was always in alarm mode for a battery fault. At the
time
I rang APC who have a service centre in Galway I think, they wanted several
hundred pounds to recon the unit.
Decided to have a look myself, went to local alarm
suppliers - bought two batteries, carefully disconnected the innards and
replaced the batteries, cleaned up the pcb etc, reassembled and haven't
looked
back since.
Only
annoyance was the power cuts earlier in the year - Mark will remember,
power
failure alarm woke us up at some ungodly time of the morning - PC still
happily
churning away, getting ready to do a controlled
shutdown.
Rgds,
Steve
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---------------------------------------------------------------
>
I took the thing apart and really didn't fancy the idea of changing
the
> batteries myself. It's clearly not intended to be a
user
> serviceable device
> and there's mains voltage in there
somewhere. However I did mail
> them about
> their
'Trade-UPS' deal and they offered me a very good discount (about
50%
>
IIRC) on a new similar spec model.
It wasn't too bad to get them
out. There's a wacking great transformer in
them which must be 40%
of
the weight (the batteries being about 50%).
> Prompts me to
another
question/train of thought:-
> Alarm panel batteries are
12v?
> PC's run on 12v?
> UPS run on
12v
batteries but step up the voltage and the PC
> transforms it
>
down?
> (anybody see where I'm going
yet?)
> 12v rechargeable battery on 12v side of PC
transformer?
>
> feasible or not ....
Don't forget that
computer PSUs also provide +5v, and possibly +3v...
I suppose the
idea
of a UPS is that it can power anything - monitor,
computer, hub,
router....
James
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