The Rayovac L91SBP-8.H3 is a superior range of Energizer Ultimate Lithium AA Batteries. These batteries not only possess an impressive life span but also come with features like leak resistance and operational capacity in extreme temperature conditions. They have the ability to retain their power up to 20 years in storage. Furthermore, these batteries are 33% lighter compared to their alkalin counterparts which makes them easier to handle and use.