Product description Lasts up to 10 times longer than regular batteries10-year
warranty in most smoke alarmsUL approved From the Manufacturer The Ultralife
10 Year Smoke Detector Battery is the only 9V battery warranted to last 10
years. Alkaline batteries in smoke detectors have to be changed every year.
With the Ultralife 10 Year Battery, state-of-the-art lithium technology keeps
your life-saving detector energized for a full 10 years. You can forget all
those "low-battery" alarms that always seem to sound in the middle of the
night. It is a must for second homes where your smoke detector can fail when
you're not there. This battery contains no toxic metals.