ULTRA LIFE, 10 year, smoke alarm battery, U9VL-X

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. Voltage: 9V Battery type: Lithium Manganese Dioxide Battery Capacity: 1200 mAh Upgrade all your smoke detectors to 10-year life with the only battery warranted for 10 years Reliable lithium battery keeps life-saving detectors energized for a full 10 years Eliminate the cost and inconvenience of yearly battery changes in your smoke detectors Forget all those low battery alarms that always seem to sound in the middle of the night