Energizer AAA Ultimate Lithium Batteries - For the countless electronic gadgets that you can't live without, get the latest lithium battery technology that is proven to be the world's longest lasting AAA batteries in high-tech devices. The #1 longest-lasting AAA batteries in high tech devices Weighs 1/3 less than standard alkaline batteries Performs in extreme temperatures from -40degF to 140degF Holds power for 20 years in storage Guaranteed leak-proof construction (based on standard use)