The adapter is easy to use with the PR44 675 Blue Tab Zinc Air battery and simply screws into the battery compartment of your camera. I am curious why there are so many many posts on the Internet on how to make substitutes for the Mercury PX625 batteries. If you consider camera cost, the lifetime cost of film, chemistry, etc.. that you will pay with this camera is it important to save a couple dollars/euros/pounds on a light meter battery?

both equally smooth, crisp, and seemed to function wonderfully. Now to the reason for this posting. What battery to use. The LR625 is cheap and almost in the same size as the LR625. The only problem is that the voltage of LR625 is 1.5v, which is 0.15v higher than that of the PX625. The difference in voltage may slightly affect the light meter. But in reality, it does not matter much. The PX625 is a small button-shaped 1.35volt mercury battery which a great number of camera models were designed to use. Unfortunately, they are either very difficult to find or very pricey. and more precisely to these two 101's. Whether you would get the same results cannot be guaranteed byThe PX625 Battery Adapter allows you to use a modern PR44 675 Blue Tab Zinc Air battery in cameras that require a MR9, 625A, MRB625, PX625, EPX625, PX13, mercury battery. The PR44 675 Blue Tab Zinc Air battery is rated 1.45v and provides a very stable 1.35V output, which is the same voltage as the original mercury battery. This ensures that your camera’s light meter will function properly. The mercury cell problem and its solutions (PDF file) by F. de Gruijter. Also discusses PX675 and other mercury batteries. Zinc air hearing aid batteries have a flat discharge curve and a lower voltage of 1.4v -1.45v. Therefore it is possible to use these with the adapter above as a replacement for the 625. The downside is that zinc air have a relatively short lifetime of around a month, and can discharge blue goo when then are used up. Some old cameras and meters (e.g. Nikkormat FTN, Canon Cannonet QL17 iii, Gossen Lunasix 3, Pentax Spotmatic F) used the 625 mercuric oxide cell. Batteries based on this technology are now illegal in many countries and often a replacement is needed.

Alkaline batteries have an unpredictable drop off in voltage over their life - they start off at 1.5v, but will end up well below 1.35v. Because of the bridge circuit the spotty should be better placed to deal with this than other brands, but I'm not sure if it can compensate for low voltage (others may be able to confirm). cover occurred during the test shots. That is not to say that a high thin cloud could not have passed The PX625 (also referred to by other names such as PX13) is a small button-shaped 1.35volt mercury battery which great number of camera models were designed to use.

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cost difference between the solutions. It is close enough that each person will have to make up their thank you Wikipedia) or the battery would discharge itself (down to 1.35v) in the adapter regardless of whether it was installed in a camera? And there doesn't seem to be either the space or the spare voltage for a more complex circuit. I have previously written about adapting a 675 hearing aid battery for use in cameras that require a 1.35 volt PX625. I was pretty confident at the time that since hearing aid batteries operate at 1.4v that this was the solution to this problem… I have since found out that actually, this solution is not always quite as ideal as I had originally thought. The PX625 Camera Battery Adapter replaces MR9, 625A, MRB625, PX625, EPX625, PX13 discontinued mercury cells.