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Hello, first timer here. I have a 124i system that has been hanging on the wall for many years and I want to change the battery on the CPU card. It is getting old and I want to do a little preventative maintenance. Can I change the battery with the system powered on so I do not loose the programming?
Thanks
Matt
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BTW, if you can't read it with the card installed, it's a CR2032, available everywhere like walgreen's, etc.
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