This morning the UPS faulted and all the server rebooted, once the ups came back up I checked the properties page and I see that there is a battery fault and an alert (see attached picture). I click on the alert and I see this:
The batteries are 4 years old and the ambient temp is around 17-20 degrees Celsius.
I believe the fault may be with the extra external battery (A MGE Pulsar EXB 2200/3200) but I can't figure out how to remove the battery from there. I think I may hace to disconnect the whole EXB unit. Is it safe to do that while the ups is running?
Well the temp is good but even at that 4 years is about end of useful life for the small batteries in them. Should be ok to disconnect if you still have internal batteries and the system is not on battery.