On Mon, 26 Aug 2019 10:10:53 +0100 (BST), "Dave Liquorice"
wrote:

On Sun, 25 Aug 2019 21:01:19 +0100, Andy Burns wrote:

My APC Smart UPS 700 doesn't any more.

I did a minor adjustment with the "hidden" serial command,

Hardware mod on mine. If there was a firmware tweak it either didn't
do what it said it would or had undesirable knock on effects. I have
vague memories of the latter.

We have several (mainly APC) UPS's here and my normal test to their
efficiency (outside plugging them in my power meter socket thing) is
how warm they sit when idle. Most of them are 'just warm' but I would
be interested to learn if there was a specific procedure to lower the
risk of overcharging the battery (assuming such hasn't already been
applied as they are all s/h).

We have one 'Back-UPS CS 350 (that is on 'Her' PC) and several
'Back-UPS 650's'. Ironically my Windows Home Server has sat there ~10
years but not on a UPS and has survived several power outages over
that time with no issue?

Mine has 4 of the 18Ah batteries and now the electronics lump at the top
of the case still gets warm

Once I have a bit a spare cash I might get a set of batteries for the
SU2200 I have sitting doing nothing...

I also have a 1000 and 1500 VA APC 'Smart UPS's' but like you I'm
waiting for some spare cash (or reason) to get some batteries for
them. ;-)

Cheers, T i m