Rayovac Ultra Pro Alkaline 9V Batteries, 12 Pack

I have a lot of smoke detectors in my house. One of them began chirping a few days back, reminding me it's time to refresh them all with fresh 9V backup batteries. So I bought two 8-packs of these Rayovac "Ultra Pros." I ordered them in early July, 2019, and each of the batteries I received were individually labeled "Feb 2023" so it's unlikely that these had been sitting for a long time in a warehouse losing charge. When I replace batteries in my smoke detectors, I always test the voltage of the new battery I'm about to put in to make sure it's working and reasonably fresh. I only needed 12 of the 16 batteries for my detectors but went ahead and tested all 16 of these for the heck of it. They would initially read 9.39 V or 9.40 V, but if I held the testing leads to them for another 30 seconds the reading would slowly climb up to 9.50 V. I've seen other alkaline 9V batteries that measure 9.55 V or slightly higher when fresh, but I was satisfied that these all reached 9.50 and that there were no duds among my order. Note that every year or two my homeowner's insurance mails me some 9V batteries bearing their own logo, and those ones seem to have about a 20% dud rate, no joke -- this is why I decided to buy name-brand ones for my smoke detectors as I need them to work and to last a decent length of time. It's also why I decided not to buy the AmazonBasics 9V batteries. I've had great luck with AmazonBasics AA and AAA rechargeables but the reviews of the AmazonBasics 9V alkalines left me with the impression that the quality control isn't all there. Enough said -- these seemed reasonably priced, fit my Kidde-brand smoke detectors, and based on the initial voltage readings they are fresh batteries that I hope to get 16 to 18 months out of before needing to replace them.

I try to use Rayovac batteries in my 6 smoke detectors if I can get them. I did use one of the other name brands but started to have some problems with them going dead before the year of smoke detector use was up. Since I started to use Rayovac....for the past 5 years, that has not happened. I don't have to worry about these going dead. As a matter of fact, they still have a lot of juice left in them at the end of the year, so I save them for my grandchildren to use in their controllers and such! Great Batteries At A Great Price!

These batteries are fine, by the way. No issues.

In the past I always rated Rayovac batteries with five stars because in addition that they are very good and reasonably priced batteries, they were also made in the USA. Since it is no longer the case, I lowered my rating to four stars.

I use these 9 volts for my active pickups in my guitars and a lot of negative crap has been said about rayovac compared to Duracell and what's the other one oh yeah energizer but these rayovac 9 volts have lasted longer even the regular rayovac 9 volts I believe they're blue with a little bit of silver, blow away Duracell and Energizer combined. The regular rayovac 9 volts are just as good as these and for a few dollars cheaper

Works

Rayovac AL9V-6 Ultra Pro Alkaline 9V Batteries are among the least expensive 9V batteries I could find, and they seem to work very well. Currently priced at a little over $1.40 per battery, they cost much less than other name brand batteries. Amazon's product description shows a picture that states "Made in the U.S.A". The are not, and the batteries I received do not claim to be. They are made in Malaysia. It's not a big deal to me considering how little I paid for them, and the batteries are working fine. I'm happy and have no complaints.

got these for the smoke detectors in the house and they work as advertised

5 out of 6 batteries had the right voltage, one of the new battery had a voltage less than 9 volts!

Only used one battery so far, but it's working well. Bought the 12 pack of 9 volts.

EXCELENTE PRODUCTO

Needed some batteries urgently for the fire alarm in my house and got them delivered the next day. No issues until now. Good packaging and quick delivery.

That's all I know. First time I haven't owned this brand so I am hoping they have decent life. Seem like a good battery.