The ENERGIZER LR1 E90 N Batteries M9100 GP910A KN are high-quality 1.5V alkaline batteries with a long expiry date, making them ideal for a variety of devices. With a cylindrical shape and a diameter of 12mm, these batteries are suitable for both high and low drain devices. Manufactured by Energizer, a trusted brand, these batteries are reliable and durable. The chemical composition of zinc manganese dioxide provides stable performance across a wide operating temperature range (-0.4F to +131F). Whether you need batteries for everyday use or specific applications, these LR1 batteries offer consistent power and long-lasting performance.