APC UPS -- replace battery, or...?

[Percival P. Cassidy]

On 01/22/2017 11:00 AM, Ancel UnfetteredOne wrote:

I have an APC Back-UPS ES 750 to which I have plugged in my PVR (a not
particularly high-powered computer, and with only one HD). It is not
indicating that the battery is dead and needs replacing, but whenever
the power goes off, even for just a second or two, the UPS indicates
that it is overloaded (no indicator lights, and continuous sound).

Is it worth replacing the battery just in case, or is this thing ready
for the recyclers?

I usually slap on a used auto battery with cable extension to get a couple hours backup on my PC.

A few years back I read that one should not do this with consumer-grade
UPSes because they have no cooling and are designed so that during the
short time the standard battery lasts they will not reach an unsafe
temperature.

Anyway, I replaced the battery by a used one from another UPS, and all
seems to be fine.

Perce

 

[Benderthe.evilrobot]

"Percival P. Cassidy" <Nobody@NotMyISP.net> wrote in message
news:eekik2Fi1deU1@mid.individual.net...

On 01/22/2017 11:00 AM, Ancel UnfetteredOne wrote:

I have an APC Back-UPS ES 750 to which I have plugged in my PVR (a not
particularly high-powered computer, and with only one HD). It is not
indicating that the battery is dead and needs replacing, but whenever
the power goes off, even for just a second or two, the UPS indicates
that it is overloaded (no indicator lights, and continuous sound).

Is it worth replacing the battery just in case, or is this thing ready
for the recyclers?

I usually slap on a used auto battery with cable extension to get a
couple hours backup on my PC.

A few years back I read that one should not do this with consumer-grade
UPSes because they have no cooling and are designed so that during the
short time the standard battery lasts they will not reach an unsafe
temperature.

All I've seen so far had "snapper disk" thermal cutouts. Don't know the
correct name, but usually a small bakelite cylinder with a swaged on
aluminium cap and 2x 1/4" spade terminals and are usually mounted by a loose
flange with 2 screw holes. The active bit is a bi-metal disk that is bowed,
it snaps to bowed the other way when it gets hot.

You'll always find one on the magnetron/fan duct housing in a microwave
oven, they can turn up in pretty much anything that could overheat.