Originally Posted By: Treeseeker
Lithium batteries have about a 15 year shelf life, don't leak, and these ones supposedly have 8 times the working life of an alkaline battery.

That's a great point. Most people don't proactively replace their flashlight batteries on a schedule (I find yearly works fine with alkalines) and they eventually discover that the alkaline batteries have leaked, sometimes ruining the light. Definitely not a good thing for an EDC light that you may really need to work. I also keep one of those Energizer "Ultimate Lithium" AAA cells in my Fenix E05.