I have an older UPS that does not have the service tag on it. I need to know the part number for the replacement battery for the subject model. Where can I order the replacement battery?
If it is a Dell UPS it will have an LCD display. One of the items is UPS information which will have the part number as well as the service tag. If your UPS is out of warranty you can go to Batteries Plus. They list replacement batteries for Dell UPSs. The issue is they have the batteries not the battery pack. You'll have to disassemble the battery pack, replace the batteries, then reassembly the pack. The task is not that challenging as long as you pay attention.