I have a Belkin F6C1000 UPS, and the Belkin software just popped up a
message saying that I need to replace the battery. The UPS is about 3
years old now, and the Belkin software says the battery level is
100%. Do I really need to replace the battery if it is still able to
hold a full charge? Or is this a ploy by Belkin to get me to spend
more money?
Charge being full is defined by the voltage attained, not a
good sign of battery fitness for any particular runtime.
Runtime is the question, how long you need. If your use
requires trying to run system as long as possible after AC
power is off, replace the battery often, like now.
If you instead initiate a rapid shutdown after AC power is
off, you can get a few more years out of the battery.
Because it's a lead-acid battery the age is only one factor,
another is how often and how low the battery was drained
from prior power outtages. Draining one fully (Until the
unit turns itself off due to low battery) will put a lot
more wear on the battery than quickly turning off, ASAP.
If you wish to keep using the same battery and the software
warning is annoying, find the way to reset the battery
warning and take it upon yourself to schedule when to
replace it.
Belkin doesn't need a ploy to sell a battery because it
almost certainly uses some fairly standard battery type you
can buy at many places - only needing to reuse the connector
from the old battery pack if it is proprietary, but usually
it is not, usually it's only a matter of choosing between
the thinner or wider connector type on a standard size and
capacity SLA battery.