HP Forums
Zinc-Air PR44 button cell batteries - Printable Version

+- HP Forums (https://archived.hpcalc.org/museumforum)
+-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html)
+--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html)
+--- Thread: Zinc-Air PR44 button cell batteries (/thread-229488.html)



Zinc-Air PR44 button cell batteries - Basil - 08-18-2012

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 - Calum Tait - 08-18-2012

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 - Basil - 08-19-2012

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 - Marcus von Cube, Germany - 08-25-2012

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.