Replace the Lithium Battery with a Lithium coin holder.
The lithium battery is 3v.
I have done this to several 7950/30's...

Bob N9LVU

Mike wrote:
Does anyone know what the voltage and/or part number is for the memory
back-up battery ? I need to replace mine, but I can only see a '13' on top
of the battery, and the manual is of no help either.