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Zinc-air batteries question


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#1 Luigi Castellitto

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Posted 06 April 2018 - 05:52 PM

I use zinc-air batteries to replace those no longer produced, for example on my Bolex Gossen light meter.
I wondered if there was a way to slow down their discharge when they are not used, in addition to removing them from the device as do with normal batteries.
They have a really short life and cost a little bit.
Thank you. :)

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#2 Todd Pinder

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Posted 06 April 2018 - 09:35 PM

I cover the holes back up when not in use, seems to help!


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#3 Luigi Castellitto

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Posted 07 April 2018 - 07:50 PM

Thank you, Todd, in the past I tried to pack a zinc-air batteries by closing its holes; I did not seem to have achieved great results, but now I'm trying again with another one.

 
Meantime: I have read about a MR-9 battery adapter which is used with Silver Oxide batteries of 1.55v, for have 1.35v, and replace old PX13.
Do it get the same precision as with the usual zinc-air (like Wein Cell) that replaces the PX13?
Buy the adapter once and then buy the cheap silve oxide it would not be bad.

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#4 aapo lettinen

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Posted 08 April 2018 - 03:36 AM

I havent tested it but a vacuum storage can could maybe help with the aging?
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#5 Nick Collingwood

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Posted 08 April 2018 - 06:29 PM

I've heard varying results but generally it's not suggested since the voltage is different so it affects the meter reading. Fine in a pinch if you need them to even run the camera (like Nizo's) but not recommended.

 

Also I keep the little sticky cover piece that comes on them as well as the zip-lock bag and when I'm not filming, I replace the sticker and put back in the air tight bag. Seems to work well enough for me. But it IS annoying and if a mod was more accessible to make my Nizo 801M like a Pro that doesn't use the batteries, I'd be all over that.


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#6 Luigi Castellitto

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Posted 09 April 2018 - 04:18 PM

Thank you, Nick, I'm trying too with a air tight bag (and with holes covered by a sticker), we see that results come out...

 

However, the WeinCELL MRB625 have the right tension, 1.35v, the exposure meter is accurate.
Perhaps, the adapter I mentioned could be a valid substitution (also reduces to 1.35v batteries that would be 1.50v).
I will write about updates. :)

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#7 Hans Klint

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Posted 11 April 2018 - 03:54 AM

How about keeping the battery in an airtight container, and spray some Propane/butane to push out the oxygene. It works when you don't want your developer to age when there is oxygene in the bottle. 


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