WeinCell MRB625 Battery – Replacement for PX625

WeinCell MRB625 – Reliable 1.35V Mercury Replacement

The WeinCell MRB625 is a modern zinc-air replacement battery designed to replace the original 1.35V PX625 mercury cells used in many classic analog cameras.

Old mercury batteries are no longer produced due to environmental regulations. The MRB625 provides the correct voltage (1.35V) needed for accurate light meter readings in vintage cameras — without the need for voltage adapters.

It activates when exposed to air and delivers stable voltage output, making it ideal for cameras that rely on precise metering.

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Technical Specifications

• Type: Zinc-air battery
• Voltage: 1.35V
• Replacement for: PX625, PX13, V625PX, Mallory PX625
• Diameter: approx. 15.6mm
• Height: approx. 6mm
• Stable voltage output
• Mercury-free

⚠️ Note: Zinc-air batteries begin discharging once activated (air exposed). Remove the protective tab only when ready to use.

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Compatible Cameras (Examples)

The MRB625 battery is commonly used in many classic cameras including:

• Canon FTb
• Canon TX
• Canon TL
• Minolta SRT series (SRT 101, 201, 202, 303, etc.)
• Olympus OM-1
• Olympus 35 SP
• Pentax Spotmatic series
• Yashica Electro models
• Praktica MTL series
• Konica Autoreflex series
• Fujica ST series
• Rollei 35 (early versions)
• Voigtländer Bessamatic

If you’re unsure whether your camera requires a PX625 replacement, feel free to contact us.