MR-9 Adapter

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The solution for discontinued MR-9 (H-D, PX625, PX13 etc.) mercury batteries. Reusable adapter, simply change the batteries.

Use Batteries: Silver Oxide SR43 (Equivalent: SR43W, SR43SW, 386, 301)

The adapter is the same size as the original MR-9 battery, and it has a built in circuit to reduce the voltage of SR43(386) battery 1.55V to that of a mercury battery approximately 1.35V.
*Only use the silver oxide batteries. Alkaline batteries give poor results.

Suitable Models: Cameras and match-needle light meters that take MR-9 batteries.
*No additional modification is required with some exceptions.

Click here to find the suitable adapter you need.

Note :
●Battery is not included.
●Unsuitable for Large Currant
●Non-adaptable products found up so far: Products require large current, such as Canon EF (battery check lamp does not go on), and digital light meters. Use MR-9 Adapter Non-Transformation Type for those products.

Please read and understand the following before ordering

●Some models may have unexpected limitations. Take test shots with the adapter before actual shooting. Please note that we are not responsible for any issues that arise from using the adapter while shooting.

●Old products may have poor contact due to weak spring or erosion on battery contact. Please also note that there is a possibility of short circuit depending on the shape of the battery contacts.

●Some models require a contact in the battery chamber to be modified in order to use a battery adapter. Please check the list of the suitable adapters.

●Even if you use a suitable adapter and battery, the adapter may not work if the camera or light meter is defective. Please note that we do not accept returns.

●The voltage of silver batteries (SR) hardly changes with the remaining battery charge, while the voltage of alkaline batteries (LR) decreases as the remaining battery charge becomes low. Alkaline batteries are not suitable for use in models with a match-needle light meter. Alkaline batteries are prone to leakage, so be sure to remove them when the camera or light meter is not in use.

●In order to reduce the voltage with the adapter, it needs to be installed with a battery in a camera or a light meter, and a current has to flow. Just measuring with a digital tester cannot get the reduction. 

●The voltage conversion value is based on measurements at ordinary temperature and under normal shooting conditions.