This Energizer Max 529 Alkaline 6V Battery has long lasting performance and will keep going and going and going. It will allow lights to burn for hours and great for other everyday uses such as cameras, flashlights, trail cameras, MP3 players, electronic toys and more. It is mercury free so it is environmentally friendly and can be thrown away in regular trash. Great, long lasting battery! Energizer batteries are the first in the world to make batteries with zero mercury - great for the environment!