"Jack VK2CJC" wrote in message
...
I have a 3 volt lithium memory back up battery which I think may be on
its
way out. BUT.... its still reading 3.11 volts. Someone has told me to
expect
a higher voltage than indicated. Is that right?
I'm going to replace it anyhow, but wondered what the story was.

Measure it still connected within the circuit and
with the DC power switched off. If it still reads
3.11 volts then it's probably OK. I start to worry
when they read around 2.80 volts or if they are more
that 5+ Years old.

Also, BE VERY CAREFULL if the radio is a later model
Icom or similar Icom product.
Many Icom HF and VHF/UHF radios which were made
in the 1980's had their internal Op-system placed
onto volatile RAM. Bottom line is if you disconnect
the soldered in lithium coin cell of an older Icom radio
you will lobotomize the CPU and you will have to send your
Icom back to the facory for re-programming, assuming they
will still service it at all. Yaesu and Kenwood are NOT affected
by this problem.

see: http://www.icomamerica.com/support/d...s/ram_card.asp