Battery conversion
The device you are after is the MR-44 adapter, which is the same size as a mercury oxide PX675 battery, but uses a silver oxide 392 cell. Using electronics built into the adapter, it outputs 1.35V like the original PX675 battery. These cost £27.50 and are available from the Small Battery Company. Call 0208 871 3730 or visit www.smallbattery.company.org.uk.
Richard Sibley




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