Nothing outlasts EnergizerA(R) Ultimate Lithium(TM) AA batteries. The EnergizerA(R) Ultimate Lithium(TM) batteries are not only the #1 longest-lasting AA batteriesa |they are complete with leak resistance and performance in extreme temperatures (-40degF to 140degF or -40degC to 60degC). To ensure your favorite devices operate at their peak performance, depend on EnergizerA(R) Ultimate Lithium(TM) batteries for work, play and home. The #1 longest-lasting AA batteries Considered by many to be the best AA batteries Weighs 1/3 less than standard alkaline batteries Performs in extreme temperatures from -40AdegF to 140AdegF Holds power for 20 years in storage Features guaranteed leak-proof construction (based on standard use)