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

by Ultralife

Product Description

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.

Product Description

Ultralife U9VL-XC Lithium Manganese Dioxide Smoke Alarm Battery U9VL-XC General Purpose Batteries

Product Details

• Product Dimensions: 0.8 x 3.8 x 4.5 inches ; 1.6 ounces
• Shipping Weight: 1.6 ounces (View shipping rates and policies)
• Shipping: This item can only be shipped to the 48 contiguous states. We regret it cannot be shipped to APO/FPO, Hawaii, Alaska, or Puerto Rico.
• ASIN: B00004W3ZE
• Item model number: U9VL-X
• Batteries: 1 Lithium ion batteries required.
• Average Customer Review: 3.2 out of 5 stars  See all reviews (40 customer reviews)
• Amazon Best Sellers Rank: #5,159 in Home Improvement (See Top 100 in Home Improvement)
  • #26 in Home Improvement > Safety & Security > Fire Safety > Smoke Alarms

Customer Reviews

Most Helpful Customer Reviews

39 of 41 people found the following review helpful:

5.0 out of 5 stars Ultralife 9-volt lithium battery life in smoke alarms and carbon monoxide detectors, November 22, 2006

By 

Industry Expert - See all my reviews

This review is from: ULTRA LIFE, 10 year, smoke alarm battery, U9VL-X (Tools & Home Improvement)

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.

22 of 23 people found the following review helpful:

4.0 out of 5 stars 10 Years - probably*, June 23, 2007

By 

B. Lotze (Louisville, KY USA) - See all my reviews
(REAL NAME)   

This review is from: ULTRA LIFE, 10 year, smoke alarm battery, U9VL-X (Tools & Home Improvement)

* Assuming you have smoke detectors that are hardwired to AC, with battery backup (your 10 year cell). Since the AC will be running your detector 99% of the time, a long "shelf life" battery is just what you need to not mess with the dumb things too often. Although, be prepared to wedge the things in there - depending on your model this can be a tight squeeze. And taking it out if it was, may involve the use of vice type pliers.

34 of 39 people found the following review helpful:

4.0 out of 5 stars Lithium Batteries Are Good For High Ceiling Smoke Alarms, August 29, 2006

By 

Craig S. Harrison (Santa Rosa, CA) - See all my reviews
(REAL NAME)   

This review is from: ULTRA LIFE, 10 year, smoke alarm battery, U9VL-X (Tools & Home Improvement)

I can't comment on this particular battery, but I will comment on this subject generally. We have 7 smoke alarms in our house -- building code overkill. One of our ceilings is 14 feet high. There is much more danger that I will be seriously injured in falling off of a ladder by replacing that high ceiling battery once a year than I will be injured in a house fire. But no one thought of the big picture or asked me when they built my house. And when that high ceiling battery starts to chirp in the middle of the night because it is low, forget about getting any more sleep. And you will be in fine condition to climb a tall ladder in the morning.

Lithium batteries should last 5-7 years, so that means I subject myself to falling from a ladder to one-fifth or one-seventh as often compared to regular batteries. Just be careful. Radio Shack makes Lithium batteries, but they are larger than normal 9 volt batteries and might not fit into your device.