The Museum of HP Calculators

HP Forum Archive 05

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Re: HP-33C repair
Message #1 Posted by J. Lopez on 16 Mar 2001, 1:25 p.m.

Yup, I kept the battery pack in the calc compartment all the time. After several hours of trying to charge it, I unplugged the calc from the wall outlet and tried to turn it on but nothing happened. However, plugging it again to the AC outlet, the display lits up showing, again, some "Error" number. Will try tonight the trick with two AA's.

Can one get a replacement Ni-Cad battery pack for these machines? I'm thinking some cordless phone receivers use the same battery shape. Maybe these could be used in the HP-33C?

Thanks for your reply, Warren

Re: HP-33C repair
Message #2 Posted by D. Banks on 16 Mar 2001, 2:41 p.m.,
in response to message #1 by J. Lopez

Radio Shack sells a great variety of AA NiCds - some with solder tabs, some without.

What I found is that they also sell a battery pack for some kind of cordless phone that contains 5 AAs tabbed together in series. Per battery, I think it's cheaper than actually buying loose NiCds. I had great luck just snipping off a pair of batteries from one of these packs. The two batteries are already tabbed together, and just ready to drop into the 3x series battery pack frame. Total time to rebuild the pack is under 5 minutes.

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