[Monkeydad]

Another tip, spend a few extra dollars to get a hard-wired detector...no more risking having a dead battery at the wrong time.

The one nearest my kitchen is hard-wired. I added another one downstairs by the laundry room/garage door that uses the 9V. Changed it last week. Since there is significantly more risk of a kitchen fire, I'm glad that's the one that will never have a dead battery. (actually had some oil flame up last year on me, on the stovetop...used an oil with lower flare-up temp and was unaware until AFTER the flames). Luckily, I keep an extinguisher tucked right beside the fridge and got it out immediately. Had to repaint the kitchen though!

No more making deep-fried doughnuts at home for me...not worth the risk!