I need to replace a very old CO monitor that I doubt is even registering. I was planning to do this as a plug in AC type with digital display. I would prefer not to mess with batteries. In the interest in keeping my vampire loads to a minimum I would like to find one pulling a minimal amount of current. My old one like this pulls about 3W continuously. I was hoping a newer one might pull about 1W, but I haven't found any operating power usage ratings for these. The specs merely indicate 60 mA peak current (giving me the max with the alarm sounding.) Does anyone have any recommendations for low wattage ones? I might even put in more than one, but only one of them will need a display.