I have a TRI_PLC model T100MD888+ PLC with a SDRAM  UT62256CPC-70LL 
volatile memory. There is a model MX-RTC realtime clock module with 
lithium backup battery. The module looks like a 28 pin DIP socket 
piggybacked between the board socket and the Ram. I would prefer to have 
a replaceable battery that I could replace say annually when I do the 
smoke detector batteries (and a few assorted others). Would seem that I 
could take a DIP socket, (or 2)  bend a few pins, bring some wires out 
and have a couple of AA batteries, (it wants 3 volts I believe) diodes, 
etc, or even a 9 volt battery and a regulator.

I'm thinking I want more reliability, standard replacement than buying a 
special part offers. I'm hoping this unit will still being in service 
for many years.

Thoughts??
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