Re: [Slightly OT Contd...] - UPS Calibration.

["Andy Whitfield" <andywhitfield2002@xxxxxxxxxxx>]

--- In ukha_d@xxxxxxx, Phil Harris <phil@a...> wrote:
> Dave wrote:
>
> The batteries are all the same mate ... the "APC" branded
packs
that
> came out of my UPS (which I have had sat on the floor for three
years on
> top of a network cable to stop it getting pulled and yanking my
switch
> off the shelf) were, when I peeled off the APC labels and parted
the
> packs out of curiosity, bog standard GP branded 12v 17Ah
"slightly
> bigger than motorcycle" batteries.
>
> Nothing special at all.
> Phil

APC don't make their own batteries.  They typically use CSB and
Panasonic batteries.
There are different lead-acid technologies.  UPSs use AGM non-
spillable batteries that can be installed in any orientation.  Cars
batteries have to be installed upright as they are spillable.  I
don't know what motorbikes use?  Maybe AGM?  Anyone know?
Lead acid batteries have a shelf life and should be regularly charged
about every 6 months.
If left too long they can suffer damage.  Sometimes this can be a
single cell going short circuit and this can lead to the other cells
in the battery over charging and being damaged.
Regards
Andy