Customer Reviews

Ultralife 9v Long Life Lithium Battery

5 star:		(13)
4 star:		(2)
3 star:		(1)
2 star:		(3)
1 star:		(9)

 

 

A long life battery to make changing the battery in my not easily accessible smoke/fire detector as infrequent as possible. Very satisfied with the "Ultralife 9v lithium battery" which lasted approximately 4 1/2 years. Excellent!

One Ultralife 9v has powered my portable headphone amp for almost 40 hours and it's still going strong! This is normally a 10-hour stint with a regular 9v alkaline battery. Not cheap, but I can imagine 5x normal alkaline life with these lithium powerhouses in low-drain electronics.

I've been using these batteries for over a decade. I usually buy 10 at a time. The last batch I purchased had a 50% failure rate. Opening the sealed package had batteries with leaks, discolored bodies and low voltage.

Several attempts at contacting the manufacturer, including filling out the RMA form have been 100% ignored. They even have section on the website dedicated for RMAs for the batteries, so it's clear that they know about the problems.

Won't ever touch anything with the Ultralife name on it.

There are now other choices such as Energizer for lithium 9V cells. At least they actually honor their warranty.

These batteries are just a bit bigger that conventional alkalines. I installed in two identical smoke alarms and one would not accommodate this product. The smoke alarm seemed to work for a while but then started chirping. The battery tested fine, I just think the fit did not allow the proper contacts to be maintained. I let you know if the other one fails as well!

I had installed several of these last year in inaccessible smoke alarms.
after a sleepless night, with the usual beeping; I am looking for a better brand.
Max experienced life = < 2yrs; same as with a name brand alkaline battery

Dead in 17 months. These things are supposed to last up to 10 years in an electric smoke alarm, i.e. it doesn't power the smoke alarm, it's just there as a backup in case of power failure. Well, I purchased 14 of these, and after 17 months, two have already failed (typical beep in the middle of the night, why does it always happen at night?) and I fully expect the rest to start failing one by one. Go for another brand or stick with regular alkaline for a fraction of the cost.

I use these batteries in my Ibanez BTB450 Bass guitar. It has an 18 volt active electronic system. It activates when I plug in to the guitar. If I forget to unplug, it keeps the system operating as if I'm still playing. When I use Alkaline and I leave it plugged in overnight it saps the battery. However, I left these monsters plugged in two days and thought for sure I would have to replace the batteries. Well, I have continued to play on them for an additional month now!

if you're sick of changing those smoke alarm batteries every year, this is the product for you. works very well.

Although the manufacturer claims the battery lasts up to 5 years, my batteries ran out in 2 years. I am using these batteries in smoke detectors.

I was surprised to see the negative reviews here. I have been using Ultralife batteries for years in my smoke detectors, and I am only now starting to replace batteries I placed in the units in 2001. I am getting 10+ years out of these, and will buy them again.