HP 21



#4

I still have the HP 21 that I used through engineering school, it does not have a battery pack or charger. I sure would like to get it back in operation. Can you direct me to anyone that can help me get it back working?

Thanks,

RLS


#5

fixthatcalc.com could probably do it, and there have been some rebuilt battery packs listed on eBay recently, though others would know better than I if they are for 20-series calculators.


#6

The fabricated packs on eBay are for the Classics (35/45/55/65/67/70/80), they will not work for a 20 series Woodstock.

Woodstocks require a specific battery, a two piece plastic shell which got sealed together, encapsulating two AA rechargeable cells with a spring in one end. Very special and quite hard to find as they usually got thrown out years ago when they showed signs of leakage. HP ceased battery sales in 1995 (or thereabouts) so replacements are non-exsistent other than eBay and those usually come with a calculator...

Personally, I have more calculators and chargers than batteries for my 21/22/25/25C/29C and yes, I'm still looking for a 27 :(


Possibly Related Threads...
Thread Author Replies Views Last Post
  HP 21 - How to troubleshoot? Adam Vaughn 13 650 10-02-2013, 09:40 AM
Last Post: Adam Vaughn
  HP-35A/21 D.MS<-->Decimal degrees routines Matt Agajanian 9 621 03-29-2012, 11:03 AM
Last Post: Matt Agajanian
  21, 45, 32E--which should be next? Matt Agajanian 14 832 03-25-2012, 02:48 AM
Last Post: Thomas Radtke
  If the 21 came after the 45...? Matt Agajanian 5 348 03-24-2012, 05:45 PM
Last Post: Matt Agajanian
  HP-21 displays all zeroes Barry Smith 5 350 01-27-2012, 01:22 PM
Last Post: Steve Simpkin
  New -21 and -25 apps for iPhone Eric Smith 14 760 03-12-2011, 05:39 PM
Last Post: Eddie W. Shore
  HP 21 calculator Chris Stam 0 154 01-30-2011, 07:58 AM
Last Post: Chris Stam
  HP 21 keyboard problem Yvan Van Hoof 2 233 11-23-2010, 12:21 PM
Last Post: Jeff O.
  HP-21 sells for nearly $400 on TOS! Michael Meyer 14 789 09-18-2010, 04:56 PM
Last Post: Peter Geiser
  HP-21 Rides again Namir 5 358 05-26-2010, 05:55 AM
Last Post: Thomas Okken

Forum Jump: