HELP! This battery a mistake?

If you want a good run down on the vagaries of Silver/Alkaline/Zinc Oxide battery cell performance, have a look at this. Could save you a lot of time. Whether you care is up to you but the information is already there. I use SR44's in an adaptor to replace the PX625's that my Nikon was designed to use.
<http://www.butkus.org/chinon/batt-adapt-us.pdf>
 
Excellent Article!

Excellent Article!

Leigh Youdale said:
If you want a good run down on the vagaries of Silver/Alkaline/Zinc Oxide battery cell performance, have a look at this.
<http://www.butkus.org/chinon/batt-adapt-us.pdf>
Click to expand...

Thanks, Leigh, for the pointer to this excellent article. I had seen it some time ago, then lost it. The graph on page 3 tells all. The only batteries with constant voltage over their lifetimes are silver-oxide, mercury, and zinc-air. All the others see large changes in voltage as they drain.

I would still like to know for sure whether this makes a difference for Yashica Electros.
 
The electros are not sensitive to battery voltage regarding exposure. I did the math some time ago, and there was about a 10% difference in exposure using alkaline batteries, which is less than 1/3 of a stop. The issue with the electros is that because they use an electromagnet and incandescent bulbs, they have a far greater current draw than other cameras of the era. Most batteries used as replacements are not built to source that much current and exhibit a high voltage drop, even when brand new. There is a great article on this here: http://www.monopix.co.uk/gtbattery.shtml Incidentally, the A32PX (PC164) exhibits the lowest voltage drop, even though it is an alkaline.
 
Stair said:
The electros are not sensitive to battery voltage regarding exposure. I did the math some time ago, and there was about a 10% difference in exposure using alkaline batteries, which is less than 1/3 of a stop. The issue with the electros is that because they use an electromagnet and incandescent bulbs, they have a far greater current draw than other cameras of the era. Most batteries used as replacements are not built to source that much current and exhibit a high voltage drop, even when brand new. There is a great article on this here: http://www.monopix.co.uk/gtbattery.shtml Incidentally, the A32PX (PC164) exhibits the lowest voltage drop, even though it is an alkaline.
Click to expand...

Stair, thanks for the pointer. That looks to me to be an excellent article, and his measurements agree with your math.

I'm glad to hear this conclusion: For the Electros, battery voltage doesn't affect exposure.
 
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