I am very impressed with the longevity of these batteries. I don't usually use 9V batteries, but when I do, it's for important devices like my fire alarm. It's crucial for me to have a reliable battery in there, and these seem to fit the bill. They last a significant amount of time and are reasonably priced. So far, I am very satisfied with their performance.

This product is not a good value because half of the batteries in the pack were already dead. I will not purchase these again.

I have found that these batteries work well for my smoke alarm and I typically change them during daylight savings time. They are the only ones I have found that hold up well.

These batteries were purchased nearly a year ago for smoke detectors and other devices around the house. They are kept in my toolbox until needed, and so far, three of them still show a voltage of 9V (9.58V). It is important to have batteries with a long shelf life when you only replace them every few months, as they can discharge over time. Although I can't say if they will last the advertised 5-6 years, I am confident I will use them all within the next 3-4 years.

I've had this item installed in my smoke alarm for over 4 months and so far it hasn't beeped, which is a good sign. However, I don't understand why it asks for a rate for remote control when it's not remote controllable. I gave it one star for this reason.

I find that these batteries need to be replaced much more often than other brands. Even when using a 9volt battery in a smoke detector, I still have to change it frequently. I have replaced the batteries in my alarms multiple times and they just don't last. I would not recommend them.

Upon receiving the 12 pack of Impecca Batteries, I promptly installed them in my Smoke Alarms and Carbon Monoxide Alarms during Daylight Savings Time. Each battery emitted a loud and clear chirp when tested after installation. They are currently functioning well, although I will need to wait to determine their longevity. At this point, I am satisfied with these budget batteries.

This is my first time purchasing these items. We recently installed them in our CO2/fire alarms and a guitar.