Nothing outlasts Energizer® Ultimate Lithium™ batteries. The Energizer® Ultimate Lithium™ batteries are not only the #1 longest-lasting batteries…they are 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. Energizer Ultimate Lithium™ batteries are 100% leak proof*