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

Yes.

Chris

Thanks for your help

Matt

BTW, if you can't read it with the card installed, it's a CR2032, available everywhere like walgreen's, etc.