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PX21 / 523 4.5V alkaline batteries equivalent to A133 EN133A PC133A V21PX RPX21 A21PX EPX21 3LR50 1306AP.


Type: Alkaline. Voltage: 4.5 V.

Diameter: 16.8 mm. Height: 49.9 mm. 

Price: 9.69 each. 9.26 each if you buy two or more. Postage and packing included.

Also known as: A133 / 523 / EN133A / PC133A / V21PX / RPX21 / A21PX / APX21 / EPX21 / 3LR50 / 1306AP / Mallory TR133.

The PX21 or 523 is an unusual cell often used in classic cameras. It is a cylindrical battery with flat contacts at each end.

The PX21 or 523 battery is used to maintain computer time, date and configuration in certain models of Apple Macintosh computer (Parameter Random Access Memory, Parameter RAM, or just PRAM). Apple Macintosh Plus, Macintosh 512 and Macintosh 512K E take this battery.

Cameras such as the Praktica LLC, EE2/EE3, PLC2/PLC3, VLC/VLC2/VLC3 and Bolex H16 Movie Camera take this PX21 or 523 battery.

This PX21 battery has an NSN number of 6135-99-114-1239 and a US Military part number of BA-1098/U.

The PX21 or 523 is a very hard to find battery. Consider buying more than one. These Alkaline cells have a shelf life of several years, so buy two and make sure you always have a ready supply of power for your camera whilst taking advantage of our reduced price multi-buy offer.  

* Actual manufacturer may vary depending upon availability

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