HP Forums
HP-21 battery terminals - 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: HP-21 battery terminals (/thread-30742.html)



HP-21 battery terminals - Natalie Wilkie - 03-26-2003

Hi,

I was given an HP-21 and the previous owner had replaced the batteries with standard 1.5 volt batteries. Does anyone know if this may have damaged it and can you tell me which pin is +ve and -ve.

Thanks
Natalie


Re: HP-21 battery terminals - db (martinez, ca.) - 03-26-2003

according to the archives that does no harm (if you have any doubt then use used batteries) . the pin on the same side as the enter key is pos.


Re: HP-21 battery terminals - Natalie - 03-27-2003

Thank you


Re: HP-21 battery terminals - David Smith - 03-27-2003

If you have a battery holder that has been opened up, the battery polarity is molded inside the holder.