ULTRA LIFE, 10 year, smoke alarm battery, U9VL-X
by Ultra Life Battery
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Tools and Hardware Reviews of ULTRA LIFE, 10 year, smoke alarm battery, U9VL-X
Customer Review: Lasts 3 years
Summary: 2 Stars
Bought a few of these in 2004, two have started giving out, three years later.Customer Review: Expect only 2 to 3 years life in smoke detectors at Most!!!
Summary: 1 Stars
I bought 6 first alert smoke detectors 5/27/07.
They all came with Ultralife Lithium Power Cell batteries.
The smoke detectors all have stickers on them that say "10 year Lithium Battery".
I would assume that since they actually put the sticker directly on the battery compartment of the smoke alarm that they were not talking about a 10 year shelf life or storage life. All 6 of the Ultralife Power Cell Batteries failed and lost their charge in less than 3 years. All of them were sounding low battery beeps in hallways keeping condominium residents awake at night, resulting in multiple phone calls and complaints.
They were used in a dry, warm and normal atmosphere.
First Alert should change their Adds to read "10 year Warranty" but
absolutely not a "10 year battery"!
I think this is an embarrasment to the First Alert company to connect the
Ultralife name to any of their products.
Customer Review: Battery double-talk
Summary: 1 Stars
Lithium batteries excel with the lowest rate of internal leakage of any type of battery. This means that they will retain at least 80% of their charge during STORAGE for more than ten years. However, when used to OPERATE a device such as a smoke detector, a single lithium battery will slightly outlast two of the same size alkaline batteries. Claims for greater than 2X lithium versus alkaline battery endurance are based on non-typical use in extreme temperatures, and/or unrealistic comparison with obsolete zinc-carbon battery technology.
Nonetheless, certain expensive "10 yr" smoke detectors embody a special, NON-REPLACEABLE, large capacity lithium battery which has given seven years' service so far, in my experience.
Customer Review: When 1/2 = 5
Summary: 1 Stars
For thirteen years I lived in a home with six smoke detectors. They had alkaline 9V batteries which we replaced every third year, whether they needed to be replaced, or not. We moved less than two years ago and installed Ultralife lithium batteries in all seven smoke detectors. And in less than two years (closer to 15 months), the smoke detectors are starting to beep, indicating the batteries need to be replaced. So how is 15 months life five times better than 3 years?
(BTW - not sure which Ultralife battery I have, this $5.00 one or the one that's twice as expensive. I think it's the one that's twice as expensive. $70 for 7 batteries, as I recall. Maybe this cheaper one is better than its more expensive sibling.)
Customer Review: Inaccurate and misleading description
Summary: 1 Stars
A lithium 9v battery will not keep your smoke detector working for 10 years. It has a 10-year shelf life. If you buy one and store it away in a cabinet, it will be fresh and usable 10 years later.
In actual use, it will last 3-5 times longer than an alkaline battery. If you replace your regular battery once a year, this battery should last 3-5 years.
I am sure this is a fine battery and will work well in a smoke detector and last longer than an alkaline battery. Just dont expect it to last, working in your detector, for 10 years.