I put these in some outdoor temperature sensors and they worked reliably down to -35 degrees C. They were still working 1 year later but I replaced them anyway just to be sure that they would not stop in the middle of the winter.
I posted this on another packaging, but there seems to be a lack of understanding on battery life.The shelf life of this battery is rated at 10 years. The shelf life of a standard alkaline is rated at 5 years. So it's twice a long lived if you don't draw any current.The mah capacity of this device (at low current drain) is 750. For the alkaline, 600. So it lasts just a little longer in use.There are 2 types of smoke detecto..