ULTRA LIFE, 10 year, smoke alarm battery, U9VL-X
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Tools and Hardware Reviews of ULTRA LIFE, 10 year, smoke alarm battery, U9VL-X
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: Five-Year Worked Great, I'll Trust the Ten-Year
Summary: 5 Stars
I haven't yet used the Ultralife 10-year battery but I can vouch for the 5-year version. I just pulled one from a smoke alarm and I had dated it July 13, 2003. So it lasted four years and four months, less than five years but it was also the smoke alarm closest to the kitchen, and thus was probably a bit drained by the fifty or so burnt cooking false alarms over the past four+ years.
Ultralife makes a truly great product so I gladly upgraded and ordered four of the 10-year batteries. The added safety and convenience makes them worth every cent.
I'll update this review in 8-10 years when these batteries stop working.
Customer Review: GREAT!
Summary: 5 Stars
Great batteries... don't know why they don't just ship the darned smoke detectors with 'em.
Put 'em in, and they'll last the life of the detector!
pat
Customer Review: Good battery, but doesn't last 10 years
Summary: 4 Stars
This is a very good lithium battery. As others have noted, the "10 year" is misleading. We use these lithium batteries in our ADT alarm system wireless window alarm sensors and in some water-leak detectors in basement. All require juice 24 x 7 and they last about 4-5 years; a normal 9v battery would last less than a year. So these are good for applications that need power over a long-life, just forget the ten year claim and think in the range of three to five years. The battery is a "5" in my view but I rate a "4" due to the misleading claim.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.