Lithium batteries should have a 20 year shelf life - just check Energizer - these are cheaper

Actually it comes with a 9 year shelf life based on the date on the batteries. One year is already gone from sitting on the Amazon shelf somewhere. In other words, the batteries aren't fresh.We will see how they last in my barn door digital lock in upper Michigan. Gets pretty cold up there. In my eight years of owning the place I've recorded a low temp of -31 (wind chill: -50. Good thing the battery is on the inside of the door). Time will tell how these will last now.

Bought these batteries for my electric guitar Pre-amp. They will not go into the battery compartment. Slightly larger than a standard 9 volt battery. Tried this battery in two different guitars, will not fit either one. I've been using EBL brand batteries, and they do fit.

Unwrapped two batteries today and both were dead.

I put one of these in a Stanley outdoor garage-door open keypad. It's located in a completely enclosed alcove but it's outdoors where winter temps are often below freezing. It was sub-zero twice last year, but winter temps probably averaged 20 degrees (F) for a couple of months.The only time the keypad draws power is when buttons are pressed for the 4-digit keycode + 'Open' and it transmits these to the opener. Then it flashes the lit 'Open' button a few times. (5 seconds? I never timed it. LOL)Since I close the garage door from inside the car when I return this opener keypad gets used once on work-mornings and, perhaps, 3-4 other times per week to access snow-blower/mower/gas cans/etc. So... 7-8 times per week. But this battery only handled this very light workload for about 6 months.The old alkaline (MUCH cheaper) Energizer/Duracells I used to use lasted YEARS. I read lithium batteries are strongly-recommended for low-temp uses so I switched. I shouldn't have listened.