These are the best lithium batteries I've found so far. I used the Energizer Lithium before, and they didn't last very long.I tested all 12 batteries when they arrived, each one was 9.64v +/- 0.1v with a couple of them as high as 9.66v. I installed 10 of them in smoke detectors and after 2 years, they are all still running fine. I just tested the 2 that I put in storage and they have not changed at 9.64v +/- 0.1v. Awesome!Highly recommended!

These outlast regular name brand batteries in a smoke detector that eats them like crazy, for about the same price as a regular 9v.

The packaging is absolutely safety-based, no expense spared: each battery is wrapped and slotted into its own section in a heavy-duty carboard box. Fantastic start.I've only installed two in a music instrument and it's working fine.I'll update my review as time progresses. So far, highly recommended.

Inhave a few detectors up on a high ceiling and am tired of the batteries dying. I have to use a 12 foot ladder to ge to them and I'm past the age for high wire acts. Pricey but worth the cost for this use.

Replacing smoke detector batteries is never fun, but it can be a nightmare when the batteries that you buy don't fit. I tried two other brands of Lithium 10 year batteries that were too large and wouldn't fit into the smoke detector because the corner of the battery were too boxy. I love that the corners of these batteries are slightly rounded and best of all, they are soooo easy to push into the smoke detector. I'm so happy I decided to try the Amazon Basic brand. This is the only brand of smoke detector batteries that I will ever purchase!

Battery works as expected for a pet no-bark item purchased from Amazon. It émis a tone that interrupts barking, so having a long life battery is a must for apartment living. Barking would be a problem where I live, so this battery has already lasted longer than the previous battery! Yay, “No bark.”

I needed a 9 volt Lithium battery to weather Michigan cold. I had tried standard batteries, but they didn't last the winter. I bought the "Amazon Basics 4-Pack 9 Volt High-Performance Lithium Batteries" which were more reasonably priced than other brands. I use them in a remote motion sensor that sounds an alarm whenever a car enters my long driveway.

These are perfect for smoke & Co2 alarms. They last at least twice as long as alkaline batteries but they don’t cost twice as much. Why pay more for name brand batteries?

The best thing is that the battery keeps full power for a long time. Regular batteries lose their power little by little, so the performance of the metal detector drops while the battery is still "good." However, that does not happen with this battery. The power will drop off all at once, so I will be able to change batteries and start all over again rather than having just a brief time of full power. I wish it lasted longer--the next time I will keep a log to see exactly how many hours it takes to discharge.

These 9v batteries by Amazon Basics seem to be of good quality at a reasonable price. They are slightly smaller than competing Batteries, so the fit better in your devices.