[Nut-upsuser] detailed ups.test.result

[James]

My UPS has an LCD that says the battery is 100% and the estimated run 
time is 12min.
The uspc has similar results.
The problem is when line power is lost the UPS batter goes to 0% very 
quickly (seconds).

It charged to 85% when power was restored.
86-100% is slower.

I did:
$ upscmd desktop_ups test.battery.start.deep
Username (admin):
Password:
OK

Now the ups.test.result says there is a warning.
I suspect this will tell me the error.

$ upsc desktop_ups ups.test.result
Done and warning

How do I get more details about the result?
Surely there must be more.

Are the symptoms consistent with a failed battery?
It is old.