ENERGIZER Inc. is one of the largest and oldest American companies that was founded in 1896. The company is known as one of the largest manufacturers of flashlights, batteries, and chargers. Its headquarters is located in St. Louis, Missouri. The company manufactures a huge range of batteries and chargers under the brand names Ray-O-Vac, Eveready, and ENERGIZER. Since the brand created its first consumer battery in 1896, ENERGIZER has been on a mission to develop innovative solutions for better performance and durability.