These Energizer L91 lithium ion batteries last longer than others, while having a shelf life up to 20 years. They especially stand out when it comes to moderate to heavy drain applications, making them the go to for our line of work. 

With a top of the line battery brand like Energizer, you can ensure top-notch performance with working temperatures from -40 to 140 degrees Fahrenheit. On top of that, they're 33% lighter than alkaline batteries.