On Friday, November 2, 2012 9:28:28 AM UTC-7, KenO wrote:
Have a Sylvania Model 72032 LED Lite that stopped working.
....
Did some checking and seems the batteries go bad

If the battery is bad, replace it. The typical
'emergency lighting' appliance has to be tested
from time to time, and commercial units recommend
battery replacement every ten years, regardless of test.

So, figure a battery has 10 year mean time between failure.
There might be 10% of the batteries that fail in the first year,
and another 10% that are good after fifteen years.

Collecting anecdotes over the internet isn't going to be
very useful in this kind of situation. Maintaining your
emergency lighting, IS very useful. So, do it.