On Thursday 27 March 2008 10:12:14 am Roger Heflin wrote:
Some of the UPS self-tests are good enough to catch the batteries
going bad and warn you, and some of them are not, the way you
learn about it is when it fails to work.
Yes, there are lower-bounds to battery life which are quite variable.
My point was that the upper-bounds are fixed. These are limited by
the technology used. And after 5 years of battery usage, the UPS's
ought to be giving a signal that the battery must be replaced.
I can't tell you how many UPS's I've seen that are supposedly good,
but have 5+ year old batteries in them. People are honestly
surprised that they don't work, as there's no indication that
something is wrong.
You don't need to run a self-test or wait until it fails after that
time period. But before then, I would agree with you.
-dwight-