We've got a TrippLite UPS which was being used improperly (no soft shutdown, etc). After talking to a rep at TL, I was informed that the 1500RTX (main device) and one of our 2 extra battery units were 8 years old, and the other extra battery was 5 years old.
I told him I purchased a webcard so I could gain more control over the unit and he told me that due to their age they would not give off accurate readings and that the power estimates were probable going to be completely unreliable.
My question is how long do the batteries usually last, and is it true that they would be inaccurate?