HP28S battery stuck!
#1

Help,

I recently got hold of a HP28S in good working condition for 6 pounds (about $9) but the 'inner' battery is stuck in the machine.

The single battery comes out easily, the first of the double batteries only comes out if I slap the calculator into my hand a few times, the last battery will not budge!

I can see a rubber strip that seems to be stopping the battery coming out because it is twisted. Can I cut this to try and remove the last battery? Does this rubber strip simply stop the batteries rattling?

The other thing I think might work is if I make a small tool by bending over a stiff wire, sliding it down the side of the battery and pulling - but I think the wire will bend.

A destructive method might be to drill a small hole in the hinge side of the calculator and push the battery out - but I don't want to do this.

Has anybody seen this problem on a clamshell HP, and if so how did they solve it?

Tom.

#2

How about adding a drop of glue (e.g. epoxy) to small rod and attaching it to the visible part of the battery.

Leave it overnight for the glue to harden and then pull on the rod.

If this fails, try a very long-thin screw.

You may also want to add a bit of electrical contact lubricant to make the battery slide out more easily, but only after you try the other two methods, because once the lubricant is in there, nothing will ever stick on that battery.

**vp



Possibly Related Threads…
Thread Author Replies Views Last Post
  Stuck Omnibook 300 pop-out mouse. Ideas? Gene Wright 5 1,914 07-03-2013, 02:52 PM
Last Post: Bill (Smithville, NJ)
  HP 39gii Stuck Again! Eddie W. Shore 3 1,306 03-06-2013, 07:47 AM
Last Post: Eddie W. Shore
  aOT--Battery/battery contact care advice needed Matt Agajanian 0 1,118 04-24-2012, 07:35 PM
Last Post: Matt Agajanian
  HP28S screen noise generator Keith Midson 7 2,387 02-19-2012, 05:35 PM
Last Post: Gilles Carpentier
  HP28S battery door trouble David Griffith 23 5,857 02-08-2012, 08:24 AM
Last Post: Neil Hamilton (Ottawa)
  HP-71B Rom Stuck in Port Jeff Davis 2 1,107 11-26-2011, 10:24 PM
Last Post: Patrice
  Nonpareil stuck Arnaud Amiel 3 1,248 08-05-2011, 10:00 PM
Last Post: Eric Smith
  HP-15C stuck in USER mode Tom Ligon 3 1,261 06-02-2011, 04:45 PM
Last Post: Etienne Victoria
  HP 25 Battery Cover Stuck? M. Pollock (Canada) 7 2,010 04-03-2011, 08:40 AM
Last Post: M. Pollock (Canada)
  HP28S - made in Indonesia? Keith Midson 1 905 11-01-2010, 08:06 AM
Last Post: Jeff O.

Forum Jump: