The Museum of HP Calculators

HP Forum Archive 13

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HP33E
Message #1 Posted by Paul Marin on 13 Nov 2003, 4:20 a.m.

I've just aquired my bosses old HP33E and the battery hasn't been used for for 3 years. I'm running it on the charger, but still no life in it. Is there a new equivelant rechargable battery available today on the market, that isnt HP?

CAn anyone help me.

Paul (Australia)

      
Re: HP33E
Message #2 Posted by Thibaut.be on 13 Nov 2003, 6:15 a.m.,
in response to message #1 by Paul Marin

If you can manage to desolidarize the batteries from the metallic pac, replace them with 2 AA cells. Positive goes on top left siden you have the calculator in your hands, back side in front of you, battery compartiment on the top side.

            
Re: HP33E
Message #3 Posted by Paul Marin on 13 Nov 2003, 6:39 a.m.,
in response to message #2 by Thibaut.be

So does this mean that this unit runs on 3 volts, using 2 AA batteries?

Paul

                  
Re: HP33E
Message #4 Posted by Nelson M. Sicuro (Brazil) on 13 Nov 2003, 7:53 a.m.,
in response to message #3 by Paul Marin

It runs on 2 AA NiCd cells, 1.25V each (2.5V), you can replace them with 2 NiMH cells. I don't know if you can put 2 simple alkaline AA cells or Zinc ones. If you do so, DON'T USE THE CHARGER!!

Regards,

Nelson

                        
Re: HP33E
Message #5 Posted by Thibaut.be on 13 Nov 2003, 8:38 a.m.,
in response to message #4 by Nelson M. Sicuro (Brazil)

It works perfectly with 2 A batteries. After all these provide with 1.3 or 1.4 V most of the time, so you're connected more often with 2.6 or 2.8 volts. Not a big deal.

And of course Nelson is totally right : do not connect your calculator with the adapter while running on standard batteries !

                              
Re: HP33E
Message #6 Posted by db(martinez,california) on 13 Nov 2003, 9:08 p.m.,
in response to message #5 by Thibaut.be

......and do not use the charger without having good rechargable batteries in place and making good contact. Other people who are much smarter than me have said here that you can fry the calc by doing that.

                                    
Re: HP33E
Message #7 Posted by Paul Marin on 14 Nov 2003, 8:04 a.m.,
in response to message #6 by db(martinez,california)

I've put in two AA alkaline batteries just to see if the unit works, and it does. Now I'm buying the Ni-cad batteries you've all suggested. Thanks guys for all your help.

Must appreciated

Ciao

Paul

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