I used to change the batteries in my smoke alarm\& CO2 monitor, but they now all have 10 year life spans. I changed the****** clocks-all 8 of them. 3 are pendulum clocks and have to be releveled. Then there were 11 timers on everything from the furnace to outside lights alarms, etc. This is no longer 1918 and our doughboys came back from WWI France over a hundred years ago. The war effort is kind of over. Why do we keep doing this, when everybody knows it's utter nonsense. (Yes, I'm ranting. Thank you for listening.)