On Mon, 01 Jun 2020 06:42:10 GMT, Jan Panteltje 
declaimed the following:


>The big question for me is: will the slightly higher voltage damage my
cameras?
>From an electronics design POV I would expect there to be a reasonable margin,
>not all AA are exactly <= 1.5V either.
>And I have repaired one A470 with ebay spare parts so I am trained :-)
>

 Not an answer but early 70s anecdotal...

 Mamiya/Sekor 528TL was spec'd for an Everready S76* button cell --
silver oxide chemistry. People following store (manufacturer) "replacement
battery" guides were often steered to a competing brand -- which used
mercury oxide.

 Then discovered that all their photos were incorrectly exposed.

 Mercury oxide => 1.35V
 Silver oxide => 1.6V


* AKA: LR44, 357, SR44



 The camera that ate batteries was the Canon A-1. Especially on long
exposures -- it could kill an expensive battery (PX28, A544, 4LR44 -- $6
for a 28Lithium version, though I think in the early 80s the cheaper
alkaline was all that was available [and died faster]) during one 5 minute
astro photo. The shutter mechanism used /electromagnets/ to hold the second
curtain in place during the exposure, and turned it off to close the
shutter. The EOS series made a great improvement on that by pulsing the
electromagnet to activate the shutter curtain.


--
 Wulfraed                 Dennis Lee Bieber         AF6VN
 wlfraed@ix.netcom.com    http://wlfraed.microdiversity.freeddns.org/

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