On Tue, 22 Aug 2017 14:18:11 -0500, Doug McIntyre wrote:

> rickman  writes:
>>Dave Liquorice wrote on 8/17/2017 5:40 AM:
>>> On Wed, 16 Aug 2017 08:08:17 +0100, Folderol wrote:
>>>
>>>> The fire alarms and emergency lighting are all SLA powered. The
>>>> batteries are still good after about 10 years ...
>>>
>>> Not APC kit then, thier stuff cooks batteries in around 3 to 4 years.
>
>>That's just not true.  I have APC units that have lasted over a decade
>>and still going strong.  It might actually be closer to two decades.
>
>
> Not sure what you are doing different, my experience is very inline with
> the reply you followed up to.
>
> Dozens of APC SmartUPS units in data centers and in the field. Their
> batteries last between 3 and 5 years and require replacement in 100% of
> my units. I wouldn't say just APC is at fault, but this is just how long
> car and motorcycle/lawn motor lead-acid cells last that the standard UPS
> vendors use.
>
> Much like my much bigger online UPS units. They all use car batteries,
> and have a definiate maintenance cycle for how often those batteries
> need to be replaced, just like in your car for it's lead acid battery.

Any sensible user of these devices should be replacing the batteries @
the recommended intervals which would be long before they ware stating to
show signs of failing.

you don't want for find out your UPS batteries are shot when you have
that power outage & loose critical data



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