10x Exell A640PX 1.5V Alkaline Battery PX640A EN640A EPX640A LR52 Exell Batteries not only provide consumers with high efficiency, long-lasting performance, they also function as Compatible With batteries for an array of common and unique applications. Ranging from vintage camera equipment to sophisticated testing equipment, Exell Batteries can meet the needs of all consumers.Type: AlkalineVoltage: 1.5 VDiameter: 16.0 mm Height: 11.2 mm Also known as: PX640A / A640PX / EN640A / EPX640A / PC640A / LR52 / 1126A. The PC640A or PX640A is a mercury-free Compatible With for the once popular Mercuric Oxide MR52 (or PX640) cell that was commonly used in cameras (such as Yashica.