[Tfug] FTGH: APC Back-UPS Pro 650

[Bexley Hall]

--- Sean Warburton <hl2addict at gmail.com> wrote:

> I just so happen to have an APC Back-UPS XS 1000
> (1000VA) which broke ("tech
> support" told me it had an internal fault, and I
> need to give them $150 more
> dollars.), but I measured the battery, and it read
> full charge
> (14.somethingvolts, and
> 1.4 amps.) Do you think the battery would be
> compatible?

I don't imagine it would be *physically* compatible.
Battery capacity == battery *volume* (more "juice"
means more *JUICE*!  :> ).  The battery for a 650VA
unit (~400W?) wouldn't have much up-time in a 1KVA
(600W?) unit -- since one assumes the load on a
larger UPS would be greater -- so usually a larger
battery / battery pack is employed.

Also, often larger UPS's have higher DC operating
voltages to cut down on switching losses -- since
the current drawn from the battery goes up with
load (larger UPS), the IR losses in the switcher
tend to grow as well.  With a higher DC to operate
from, I goes down (so IR does as well) and the
efficiency goes *up* (since IR is << battery voltage).

You could, of course, hack the battery onto the
UPS (externally) but it probably isn't worth it for
this small of a UPS.  (you are welcome to the UPS,
if you decide to tinker...)

Is Tom your dad?  Perhaps he can coax it to divulge
its problem??  (what are the symptoms?)

--don

> On 4/17/07, Terence Rudkin <trudkin at gmail.com>
> wrote:
> >
> > On 4/17/07, Bexley Hall <bexley401 at yahoo.com>
> wrote:
> > >
> > > Hi,
> > >
> > > This is a smallish UPS (650).  Battery is now
> depleted
> > > and I don't feel like investing in a new one
> ($25)
> > > since the UPS is a bit small for my needs.  It
> works,
> > > otherwise.
> >
> >
> > FYI APC gives $35 for any  UPS  when a new UPS of
> same size or lager is
> > bought, and they pay the shipping.
> >
> > I'm located NE but can possibly arrange to meet
> > > someplace to keep it out of a landfill.
> > >
> > > Thx,
> > > --don
> > >
> > >
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> 
> 
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