1/2 AA Size 3.6v Lithium Battery, ER14250 LS14250 1200 mAh Batteries Compatible for Dogwatch Dog Collar and Some of Movement Monitor/Home Security System/Alarm System - by Tyrone (6 Pack)

Not sure about battery life. I received 6, I am using battery in finger tip pulse/ox meter.

Everything was fine

Good replacement batteries for the money. Very good longevity.

Less than one year shelf-life. Bought a pack of these less than one year ago. Used a single battery and put remainder away. Used one of the remainder today and was disappointed to find it was dead. Voltage read 0.87v. Hoped it was just one dead defective cell - nope the entire pack had the same voltage and would not power my wireless alarm door sensor.

I need these half-AA batteries for some of the remote sensors in my home automation system. I log the replacement of all batteries in my system so I can see which last longest. The other brand I had been using typically lasted 150-200 days. My first set of six of these batteries lasted 250+ days. A big difference is that all six of them reported 100% battery level when I installed them, as opposed to the other brand which almost NEVER registered 100% at installation.

I have several sensors of all kinds connected to SmartThings and I have had a problem with the batteries I have been using. That's why I tried these batteries to see if it works better for me. In another review I could say if the batteries have a good lasting time.

Installed battery in a Homedics pulse and oxygen meter. Gave battery a 4 rating because only time will tell how it performs.

Batteries arrived as promised. All are fully charged (tested with voltmeter) and worked perfectly. Cost is 1/2 that of ordering thru the vendor. Check back in 18 - 24 months for update on promised battery life!