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PX21 Adapter
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This PX21 battery adapter model is designed to replace obsolete PX21 batteries in vintage analog cameras. The adapter allows the use of three standard LR44 button cells to replicate the required voltage for proper camera operation, especially for built-in light meters. For assembly, you will need: 3× LR44 batteries 1× M5 cylinder head screw (DIN 912 / ISO 4762), partially threaded, 22 mm length (zinc-plated recommended) The screw is used as part of the contact and structural setup, so correct dimensions are important for proper functionality. The model is designed with practical handling in mind, including small notches for easier removal from the battery compartment and an additional slot to simplify battery replacement.
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