Features:

• 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
• A must for second homes where smoke detectors can fail when you're not there

Editor Reviews:

Product Description:
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.

Rating : - 10 year claim is valid
The title of this item is incorrect. It's actually U9VL, not UPVL. Apparently the 10 year claim is valid for the U9VL-J battery (that's the same battery Amazon is selling here). Here's a thorough study where they validated it:
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