Exell MRB675 1.35V Mercury Replacement Battery – PX675 Hearing Aid & Camera Battery

Exell MRB675 1.35V Mercury Replacement Battery – PX675 Hearing Aid & Camera Battery

The Exell MRB675 1.35V Mercury Replacement Battery is designed to replace discontinued mercury batteries commonly used in vintage cameras, light meters, and hearing aids. Utilizing advanced zinc air technology, this battery delivers a stable 1.35V output, ensuring accurate readings and consistent performance in precision equipment. It is an ideal solution for maintaining the functionality of classic devices that require mercury-equivalent voltage.

Engineered for reliability, the MRB675 activates upon exposure to air and provides dependable power for specialty electronics. Its mercury-free composition makes it a safer and more environmentally friendly alternative, while still delivering the performance needed for sensitive analog equipment. Perfect for photographers, collectors, and hearing aid users, this battery ensures continued operation of essential devices.

Key Features:

• Exact 1.35V Output – Accurate Metering
• Ensures proper exposure without recalibration.
• Replaces PX675 / PX675H
• Drop-in replacement for mercury batteries.
• Ideal for Compact Cameras & Meters
• Designed for precision film photography equipment.
• Zinc-Air Stability
• Maintains consistent voltage during use.
• Mercury-Free Design
• Safe and modern alternative.

Product Specifications

• Brand: Exell
• Model: MRB675
• Battery Type: Mercury Replacement
• Voltage: 1.35V
• Chemistry: Zinc Air (Mercury-Free)
• Size: PX675 / 675
• Diameter: Approx. 11.6mm
• Height: Approx. 5.4mm
• Shelf Life: Limited once activated (air-activated)
• Rechargeable: No
   

Applications / Uses

• Hearing aids
• Vintage film cameras
• Light meters and exposure meters
• Photographic equipment
• Specialty analog electronics
   

Common Devices That Use MRB675 / PX675 Batteries
 

• Hearing aids (standard size 675)
• Vintage cameras requiring PX675
• Handheld light meters (Sekonic, Gossen)
• Exposure meters and analog photography tools
• Scientific and specialty instruments

Ideal For

• Hearing aid users
• Film photography enthusiasts
• Vintage camera collectors
• Professional photographers using analog equipment
• Camera repair technicians
• Electronics hobbyists
   

Cross References
 

• PX675
• 675 Hearing Aid Battery
• PR44 (zinc air equivalent)
• V675PX
• EPX675

How to Activate (IMPORTANT)

1. Remove the protective tab to allow air into the battery
2. Wait 1–2 minutes minimum (recommended up to 5 minutes)
3. Install into device

• Activation begins immediately once tab is removed
• Battery cannot be “turned off” after activation
• Waiting allows full voltage development and longer life
• Allowing time after tab removal ensures the battery reaches optimal power output before use.

Pro Tips:

• Only activate when ready to use
• Keep unused batteries sealed
• Avoid storing in humid environments