Type: Physical adapter combined with voltage reducing adapter kit
Contents: Kit contains 1 x MR-52 Adapter, 1 x MR-44 Adapter, 1 x 392 cell. Output Voltage: 1.35 V.
Diameter: 16 mm. Height: 11.2 mm. (MR44 Adapter and 392 cell)
Price: £31.50 each. Postage and packing included.
Emulates: PX640 / EPX640 / V640PX / H-N / E640N / MR52 / NR52 / 1126MP / NR52 / RPX640 / HM-N / HD640 / H-N.
1.35V replacement for: PX640A / A640PX / EN640A / EPX640A / PC640A / LR52 / 1126A.
The very best solution to problem of the discontinued Mercuric Oxide MR52 and PX640. Our MR-52 Adapter has the outer dimensions of the PX640 mercury cell with a recess that takes the our MR-44 Adapter. The MR-44 adapter has the same dimensions as a PX675 mercury cell with a recess that takes the inexpensive and easily obtained Buried within the MR-44 Adapter are micro electronics that drop the voltage from the 1.55 Volts put out by the silver oxide cell to the 1.35 Volts that your camera was designed for, whilst the MR-52 Adapter fills out the cell to the dimensions your camera was designed for.
No adjustment or modification to your camera is required. There is no need for activation or for a supply of air.
MR-52 / MR-44 Adapters are a one time purchase, and will last a lifetime. The silver oxide 392 cell will typically last up to a couple of years, depending on the current drain of your camera. At the end of its life, simply replace the expired silver oxide 392 cell with a fresh one.
There are other possible non-mercury replacement for a PX640 or MR52 cell:
An inexpensive PX640 replacement is the alkaline cell, the PC640A, LR52 or A640PX. They fit perfectly but, as with all alkaline cells the voltage is not stable, it drifts down from 1.5V towards 1.35V (the voltage of the original Mercury cell) and then lower still. If you use the cell in a camera that needs a steady reference voltage, as the voltage is not steady throughout the useful life of the cells, you need to constantly adjust how you compensate.
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