Nothing outlasts Energizer® Ultimate Lithium™ AA batteries. The Energizer® Ultimate Lithium™ batteries are the #1 longest-lasting AA batteries – complete with leak resistance and performance in extreme temperatures (-40ºF to 140ºF or -40ºC to 60ºC). To ensure your favorite devices operate at their peak performance, depend on Energizer® Ultimate Lithium™ batteries for work, play and home. When capturing memories with your digital camera, protecting your home with a security system or smart door locks, regulating your home’s temperature with a wireless thermostat, greeting guests with wireless doorbells, or managing your remote-controlled home devices, you want the World’s Highest Energy AA batteries – and what many consider the best AA batteries.