HP Forum Archive 21

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Zinc-Air PR44 button cell batteries Message #1 Posted by Basil on 18 Aug 2012, 6:03 p.m. As far as I understand, the Zinc-Air PR44 button cell batteries have the same fit, but features slightly different voltages and life capacity than the more common Silver-Oxide based SR44 batteries. Do anyone have experience using these Zinc-Air batteries with the Voyager calculator series? And if so, how are they compared to the SR44 batteries?

Re: Zinc-Air PR44 button cell batteries Message #2 Posted by Calum Tait on 18 Aug 2012, 8:33 p.m., in response to message #1 by Basil I don't have experience with using zinc-air cells in a calculator but have used them as replacements for Mercury PX625 cells in cameras. They have a fairly stable voltage to replicate the Mercury originals but once exposed to air I found they don't last long at all. Perhaps a couple of months in a lightly used camera. The problem is that they decay from the second they are exposed to air. They are also quite expensive. Is there a reason you would use these in preference to silver oxide?

Re: Zinc-Air PR44 button cell batteries Message #3 Posted by Basil on 19 Aug 2012, 4:26 a.m., in response to message #2 by Calum Tait Thanks for the information. I recently got hold of a packet with eight of these button cell batteries. But has I never used this kind of batteries before, I was a bit worried about using them with my Voyager calculators. I guess I stick to the SR44 batteries then.

Re: Zinc-Air PR44 button cell batteries Message #4 Posted by Marcus von Cube, Germany on 25 Aug 2012, 3:25 a.m., in response to message #3 by Basil They are meant for use in hearing aids. These eat lots of batteries and it is wise to use cells that contain only a minimum of toxic materials. I think this was the driving force behind the development of Zinc-Air cells.

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