New enhancements make Energizer Ultimate Lithium batteries THE best and longest-lasting disposable AA batteries. Why go a day without the devices you count on the most? Depend on Energizer Ultimate Lithium batteries for your most critical devices for work, play and home. Top Innovative Features for Energizer Ultimate Lithium Batteries: -Longest-lasting battery ideal for high-tech devices -Superior performance in extreme temperatures from -40F to 140F degrees great for use in all seasons -Holds power in storage for up to 20 years -Lighter weight than alkaline batteries -Leakproof