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Mercury Replacement Battery Catalogue

Many devices were designed to use Mercuric Oxide batteries but, because of concerns about toxicity and environmental pollution, these cells are no longer manufactured. The tables below will help you find Mercury free equivalents. Silver Oxide, Alkaline and Zinc-Air replacements are available. All produce slightly different voltages than the original mercury cell. 

Photo Batteries: Silver Oxide, Alkaline and Zinc-Air Replacements

Mercury Batteries..... Silver Oxide replacements.... Alkaline Replacements.... Zinc-Air Replacements Voltage Reducing Adapter
RM400 / PX400 1.35V S400PX

* not available *

MRB400 H-B Adapter
PX675 / MR44 1.35V SR44 / 357 LR44 / AG13 MRB675 MR-44 Adapter
PX625 / PX13 / MR9 1.35V S625PX PX625A / LR9 MRB625 MR-9 Adapter
PX1 1.35V * not available * LR50 / PX1A MR-50 Adapter
PX640 1.35V * not available * PC640A / LR52 MR-52 Adapter
PX450 1.35V * not available * * not available * PX450 Adapter
PX14 2.7V * not stocked * A14PX PX14 Adapter
PX19 4.5V * not available * PX19
PX21 4.5V * not available * PX21
PX23 5.6V S23PX * not available *
PX24 3.0V * not available * PX24
PX25 4.2V * not available * A25PX
PX26 5.6V * not available * A26PX
PX27 5.6V S27PX * not stocked * PX27 Adapter
PX28 5.6V 4SR44 4LR44 PX28L (Lithium)
PX30 3.0V * not available * * not available * PX30-L ( Lithium)
PX32 5.6V * not available * A32PX
E134, TR134 5.6V * not available * A134

Mercury Replacement Buttons

1.55V Silver Oxide Replacements

Mercuric Oxide buttons were commonplace in watches and medical equipment but, because of concerns about toxicity and environmental pollution, these cells are no longer manufactured. The table below will help you find Silver Oxide equivalents. Silver Oxide cells produce 1.55V which is a little higher than the 1.35V produced by the original mercury cell. 

Mercury Buttons..... Silver Oxide replacements.... Comment....
313 (MR44) 1.35V SR44 / 357 * in stock *
MR-44 Voltage Reducing Adapter * in stock *
Genuine Mercury PX675 / MR44 1.35V * in stock *
323 (MR48) 1.35V SR48 / 393 * in stock *
325 (MR41) 1.35V SR41 / 392 * in stock *
343 (MR42) 1.35V 344 / SR1136SW * in stock *
Accucell-1 with voltage reduction to 1.35V * in stock * These have built-in voltage reducers.
354 (MR43) 1.35V 301 / 386 / SR43SW * in stock *
387 1.35V Accucell-1 with voltage reduction to 1.35V * in stock * These have built-in voltage reducers.
387S/S400PX

* in stock * These are supplied with a little plastic collar.

394 / SR936SW * in stock * These are not supplied with a little plastic spacer. Re-use the spacer from your old 387 mercury cell.
388 1.35V 388 Adaptor  with voltage reduction to 1.35V * in stock * 
329 / SR731SW * in stock * This is not a perfect fit. There is no exact replacement for the 388. We can supply a 329-to-388 plastic adapter.
Mallory WD4 / Leclanche 15P3.5 WD4 adapter kit * available on request *

If you don't find the battery to are looking for in this list, contact us by email. Use the 'Contact Us' link in the left hand frame.

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