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(More customer reviews)To clarify some of the other comments here, the Ultralife 9-volt lithium battery is designed to operate an ionization-type smoke alarm for 10 years. The packaging for the Ultralife U9VL-X 9-volt lithium battery indicates that it's a smoke alarm battery. It will not power a carbon monoxide (CO) alarm for 10 years since a CO alarm operates at a higher current drain than a smoke alarm. Also, the sensor in most CO alarms is designed to operate for 5 to 7 years depending on the brand and model, after which the entire alarm has to be replaced. While the Ultralife battery should outlast an alkaline battery in a CO alarm, and other devices, by 2 to 3 times, don't expect it to last 10 years in devices other than ionization smoke alarms.
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9V Lithium Power Cell, Smoke Detector Battery, Lasts Up To 10 Times Longer Than Ordinary Batteries, Last Up To 4 Times Longer Than Alkaline Batteries, Recommend Ultralife Battery With Confindence For: Smoke Detector, Garage Door Openers, Security Transmitters, Radar Detectors, Remote Controls, & Radios Or Any Device Requiring A 9V Battery.
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