Exell Battery A19PX or 531 is an unusual cell often used in older Polaroid cameras. It is a cylindrical battery with one mini snap connectors at each end (the same size of mini snap found in the popular 9Volt PP3 battery).
The Exell Battery A19PX is used with older Polaroid cameras models: 100, 101, 102, 220, 225, 230, 240, 250, and 340 use one A19PX or No. 531 (4.5 volt) alkaline battery. Exell Battery A19PX is also known as V19PX, 531, RPX19, EPX19, 3LR50 and 1307AP.
Diameter: 16.8 mm
Height: 58.3 mm