[comp.sys.ibm.pc] toshiba 1100+ battery pack

hadden@ella.SRC.Honeywell.COM (George D. Hadden) (04/15/89)

hi, a while back i posted a question asking if anyone knew how to roll
their own nicad battery pack for the 1100+.  (toshiba wants 80 bucks
or so for a replacement.)  nobody did, so i gave it a shot myself.  
i've got some apparently successful results.  

here's what you need to do:

0) you'll need a phillips head screwdriver, some wide scotch tape
(cellophane shipping tape is what i used), and a heavy duty (100 watts
or so) soldering iron.

1) buy 4 heavy duty ni-cad batteries from radio shack.  these are the
4 amp-hour, $7.95 jobs, not the wimpy 1.2 amp-hour ones that you can 
buy at 2 for $5.00 from target. (i can't remember the part number.)

2) take the top off of the machine -- 3 screws in back, 4 on the
bottom. 

3) unplug the battery pack and lift it out.  you'll see it's basically
four d-cells shrink-wrapped together.  don't be put off by the seeming 
complexity of the four wires going to the cells -- they're just doubled
up, i.e. two go to the positive and two to the negative.

4) remove the shrink-wrap, and unsolder the wires (carefully -- you're
going to use them again) from the battery end.

5) lay the batteries out, alternating polarity, and tape them
together like this:

---------------------------------------
2 black wires from plug                |
                                       |
2 red wires from plug                  |
---------           ---------          |
         |         |  wire   |         |
         --     --------     --     --------      -------
      ---  --- |        | ---  --- |        |        ^
     |        ||        ||        ||        |        |
     |        ||        ||        ||        |
     |        ||        ||        ||        |    line up
     |        ||        ||        ||        |    like this
     |        ||        ||        ||        |
     |        ||        ||        ||        |        |
     |        ||        ||        ||        |        |
     |        ||        ||        ||        |        |
     |        | ---  --- |        | ---  ---         V
      --------     --     --------     --         -------
         |         |         |         |
          ---------           ---------
            wire                 wire

6) solder the wires from the plug as shown above to the batteries, and
solder the three other wires as shown.  you probably don't want to
keep your iron on these things all day, as it might damage the
batteries. 

7) pop the new pack into the 1100+, and put it back together.

naturally, i'm not going to guarantee any of this -- you do this at
your own risk.  you'll also void your warrentee, but if your machine
is under warrentee, let toshiba do it!


-geo
---
George D. Hadden, Honeywell Systems and Research Center
PHONE:  (612)782-7769
MAIL:   3660 Technology Drive MN65-2100, Minneapolis, MN 55418
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