Get the perfect replacement for the hard-to-find Eveready 493 batteries with the Exell 493A 300v Alkaline Battery (NEDA 722, ER493). This alkaline battery produces 300 V, and it is typically used in radiation measuring equipment, gamma survey meters, and other analogue devices from Raytheon and Keleket. It not only provides you with efficient and long-lasting performance, but it also functions as an excellent replacement battery for vintage cameras or sophisticated medical equipment. Replace the hard-to-find Eveready 493 cells with the Exell 493A 300v Alkaline Battery (NEDA 722, ER493).