Regulated Battery Adapters for Older Mercury Cell Light Meters

I offer an adapter for the
Asahi Pentax Spotmeter 21/1 that regulates a 3-volt lithium cell down to the 1.34 volts needed by the spotmeter. Follow this link for more information and ordering information.

PX640 Mercury Cell Regulated Adapter for Pentax Spotmeter
  Picture of PX640 adapter

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