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Weincell 12pk MRB400 Z400PX PX400 RM400 1.35V Zinc Air Batteries

SKU: MRB400_12
Weincell 12pk MRB400 Z400PX PX400 RM400 1.35V Zinc Air Batteries -More

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Box of 12 Batteries

Type: Zinc Air
Diameter: 11.2 mm
3.6 mm

1.35V Replacement for: PX400 / EPX400 / RM400 / H-B / V400PX / E400N / PM400R / KX400 / T400N

The PX400 is is a discontinued Mercuric Oxide coin type cell that was commonly used in cameras and is now banned because of toxicity and environmental fears.

The original PX400 mercury cell produced 1.35V.

There are two possible replacements for this PX400 cell:
* the equivalent silver oxide cell, the S400PX.
* the equivalent zinc air cell, the WeinCELL MRB400.

There are no alkaline cells manufactured of this size and shape.

The S400PX cells produce 1.55V which is different from the 1.35V produced by the original PX400 mercury cell. This doesn't normally cause a problem because today's films are very tolerant to under-exposure and because the under-exposure is compensated for during printing. (so you would have greater problems if you were using slides). If you do find you need to compensate, because the S400PX silver oxide cell produces a steady 1.55V, you are able to compensate for the higher voltage by a fixed number of stops or by adjusting the ASA setting. There may be as many as two f-stops underexposure by a camera that uses 1.55v instead of the original 1.35v, but the compensation you require is constant.

Another PX400 replacement is a zinc air battery. The WeinCELL MRB400 is a custom zinc/air battery designed to replace banned mercury batteries. WeinCELLs deliver the same 1.35 V voltage and stability of output as did the mercury PX400 batteries so there is no need to adjust your exposure. The WeinCELL MRB400 batteries last much longer than hearing aid batteries, some times up to a year. To achieve this longer life, the MRB400 used a proprietary electrolyte and has only two small air holes, instead of the 7 larger holes found in standard hearing aid batteries.

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Additional Info

Additional Info

Weight 0.3000
Condition New
Diameter 11.2mm
Brand Weincell
Height 3.6mm
Output Voltage 1.35V
Chemistry Zinc Air


Specification Sheets & Documents

No specification or documents available currently available for MRB400_12. If you require a spec sheet, a msds sheet or any additional documents, please contact us and to request them. We will work to accommodate you.