Nothing outlasts the long-lasting power of Energizer Ultimate Lithium Batteries. Each battery's safety-conscious, leak-proof design gives you confidence that your most-loved devices are protected against leaks and corrosion. Ultimate Lithium batteries the clear choice to dependably power the essential devices in your life.Specifications and Features: Features leak-proof construction Holds power for up to 20 years in storage Includes four Energizer Ultimate e2 AA Lithium batteries Innovative improvements make this the world's longest-lasting AA battery in high-tech devices Performs in extreme temperatures from -40F to 140F- great for use in all seasons Weighs 1/3 less than standard alkaline batteries