The Exell Battery 493A is an alkaline battery. It produces 300V and is the perfect replacement for the hard-to-find Eveready 493 battery. The Exell Battery 493A is typically used with radiation equipment, Gamma Survey Meters and Survey Meters from manufactures like Raytheon and Keleket Exell Battery is one of the few product lines Proudly Assembled in the USA. Made with Alkaline cells, Exell Batteries will last longer and offer consumers excellent reliability. Exell Batteries not only provide consumers with high efficiency, long-lasting performance, they also function as replacement batteries for an array of common and unique applications. Ranging from vintage camera equipment to sophisticated medical testing equipment, Exell Batteries can meet the needs of all consumers.