Customer Ratings & Reviews

For anyone that doesn’t know Number 9 repeated is from a Beatles song. But about these batteries... I can only say that I got them from BestBuy at a really great price and they were worth getting. Yes I DO recommend that you but these batteries and that you buy these and all your battery needs from BestBuy.

You should change your smoke detector batteries annually, so when i found this deal it was perfect. I had enough to cover my entire house's worth of smoke and CO detectors. This is a no brainer to buy. On the plus side the batteries themselves have a white label so it's PERFECT for using a sharpie on them for dating them!

I needed a couple of these batteries for my smoke detectors. Decided to just buy the 12 pack for a few dollars more and have plenty for when other detectors needed them. They seem to last quite a while, I'm happy I bought the large pack though so I don't have to worry about not having extras when needed.

Liked it . Price is good. Definitely worth it. Works good.

These are solid for the price. I use them mostly for smoke detectors and they fit nicely in mine.

The batteries came packaged well. I'm pretty happy with these batteries so far. I bought these batteries because they was on sale. I used them to replaced all of the old batteries in my smoke detectors in my house. It has been several months and I am still happy with them.

Hard to compare vs. Duracell or Energizer but they seem to last as long and are definitely priced better.

I needed to replace my smoker detector batteries, and the name brand batteries (energizer and Duracell) were 8+ dollars for a single replacement. I decided to go with Insignia since it was a two pack for less than $10. Pretty easy math. We will see how long they last in comparison to the more expensive big brothers.

Bought these as replacements for my smoke detector alarms. The quality of the battery seems slightly rushed. For example, the wrapper on the battery isn't exactly flushed and looks like it can be easily pealed off. Not a huge deal since these batteries do work and seem to last awhile, but it's obvious that they're not meant to be high end batteries.

Great price for these batteries. We replace the batteries in the smoke alarms when we change to EST. Good thing for everyone to remember when we change the time in the fall. Change your batteries in your smoke and carbon monoxide detectors.

Like the title says, I used these in my smoke detectors (probably one of the only devices that still uses them). They are on par in terms of quality with Rayovac, Energizer and Duracell. The price for a 4 pack is a really good value.

Good price for batteries that last a long time. Compared to name brands, these work just as well.

Needed to replace all the 9Volts in all my smoke alarms. Especially the one in the den because I always forget to open the window when firing up the Glass Device For Smoking Herbal Remediation, and it goes off every time man. Bummer. Anyway, great deal on this pack 'o 9Volts.

I've never had any reason to love name-brand batteries more than store-branded ones, and these are no exception. Seem just as good at about half the price (when I bought them, at least).

Excellent batteries. I use these batteries in everything. The shipping is fast and packaged well. I use these in my smoke detectors and they last a long time. I highly recommend these to everyone.

I bought these for our smoke detectors and they've been working well so far. I expect smoke detector batteries to last a minimum of a couple years so only time will tell if these are better/worse than other brands, but so far (2 months) we have no complaints.

Decided to take a chance on these because they were much much cheaper than the name brands. Tested these with a digital tester & each one was within 1/100th of a volt so very accurate. So far so good but time will tell just how long these will last, but for the price I'm willing to wait & find out. 9 volt batteries have gotten so expensive lately it's just ridiculous. Hoping this is the answer.

Great value on these batteries that last a long time in the products I have used them in. I really see very little difference in the life span between these batteries and the more expensive big name brands.

I bought this package to replace 9V in my smoke detectors, I was pleased to find that these fit perfectly with minimal manipulation. buy 4 in a package could save $...

When I do my taxes every year I replace all my batteries in my smoke and carbon monoxide detectors. I started shopping around online and Best Buy popped up 12 9v batteries for $10.00. I purchased them online and went to the store and picked them up.