Energizer-Alkaline-9V-Battery-1-Piece-Energizer-638402-P-The-Energizer-638402-is-a-High-Tech-Alkaline-9V-Battery-PP3-Type-with-Power Boost-technology-The-battery-is-the-longest-lasting-battery-in-the-Energizer-alkaline-family-The-battery-will-last-up-to-80-longer-than-other-AA-Basic-Alkaline-In-addition-the-Energizer-High-Tech-holds-power-for-10-years-when-not-in-use-P-Energizer-638402-Alkaline-9V-Battery-x 1