hi..
I have an APC UPS.. i dont remember its specifications but yes company guaranteed its capacity would be 19 min.
When it was new it used to give properly 19-20 min. but as it started getting old. the performance started worsening. Now its barely 10 min.
Dunno whats problem. may be sumthing with battery. as battery is old i guess ill need to replace it.
Even its out of warranty . warranty was 4 yrs and its just above 4 yrs.
even i got that CD. never installed it
. so dunno what it is and how it works...