Half did not last 2 weeks in smoke detectorsmm before beeping low battery chirps.
Purchased these for lithium required smoke detectors and they had to be changed out shortly after install.  Of the 12 I purchased I only had problems with 4 of them. Not sure if the shipment was old stock? But as a professional, and using in firealarm systems  I need to install only fresh batteries!
Rating: 2 stars