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What is the replacement battery for the VW3A3521 IMC card?

Issue:
The IMC memory has stopped working.  The manual indicates to contact Schneider for replacement battery information.

Product line:
VW3A3521 IMC Controller card

Environment:
n/a

Cause:
Failed battery

Resolution:
The replacement battery is part number M4T32-BR12SH6.   This battery is not sold by Schneider Electric however is available from many online retailers. 
The battery should be replaced every 8 years.
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