Sudden death of HP33S batteries


I don't recall whether this has come up before.

A week or two ago, when I was using my '33S, I got a low battery warning but everything still worked. I then turned it off (I'm pretty sure).

Two days ago, when I went to turn it back on, I got absolutely no indication that it was alive. Fortunately, nothing of much value was stored.

Today I measured the battery voltages - they were about as low as I've ever seen for batteries! Less than 0.1 V for either, no load. I'm rather surprised that the calculator in the OFF state could pull them so low. I wonder if something might have failed internally. I don't have new ones to put in yet to check that possibility. That's tomorrow's task.

So, a warning: if your '33S indicates low batteries, you better change them right away if you want to retain your work.


As I discussed some months ago with Luiz, my HP33S batts went completely dead with no warning indicator.


Possibly Related Threads...
Thread Author Replies Views Last Post
  A cure for 28S death Ed Bacon 11 2,232 04-02-2012, 09:04 AM
Last Post: Olivier De Smet
  HP-97 keyboard sudden failure BobVA 0 638 12-04-2010, 08:01 PM
Last Post: BobVA
  Is the HP33S is the only game in town? John Noble 28 4,974 11-16-2009, 10:18 AM
Last Post: John Noble
  HP33s has more programing power than one might think Howard Boardman 6 2,037 08-23-2007, 10:20 AM
Last Post: Dallas Osborne
  Death of a calculator! :-( gileno 5 1,293 01-09-2007, 12:39 PM
Last Post: Maximilian Hohmann
  HP33s - a true confession Les Wright 62 8,559 11-28-2006, 05:18 AM
Last Post: Valentin Albillo
  HP33s and HP32sII programmation difference David Boileau 7 1,468 07-13-2006, 04:05 PM
Last Post: Paul Brogger
  HP33S Check digit Derek 18 2,952 06-14-2006, 10:09 AM
Last Post: Ivan Nejgebauer
  HP33s Keyboard Issues John Daly 12 2,033 04-05-2006, 11:02 AM
Last Post: e.young
  HP33s CNA54 - improved one? Gour 2 741 02-17-2006, 02:19 PM
Last Post: Gour

Forum Jump: