I have a CO/Natural Gas meter that requires a backup battery to be able to function (without beeping), even if it is plugged in. I find that I am replacing batteries every couple of months (I have 4 in my house). I am wondering if I can use a wall wart for the 9v supply. I know that the 'backup in case of power failure' function would no longer be present, but that is not a concern of mine.
Better yet, can I hook up the 9v supply that comes with the unit (9v 400mA) to the 9v battery connector, so that the supplied 9v adaptor effectively runs both the unit's main power and it's backup? I have opened up the unit and the soldering would be incredibly easy.
Thanks in advance for any options that may be forthcoming.