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HP-67 battery



#5

I may be getting an HP-67 which is missing the batteries. Are these available anywhere? If so where do I get them. Can I use non-original Nicad batteries as replacements?


#6

Hi Glenn,

Take a look here:

http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1321217825

They work great.

Arnold

#7

Firstly, don't be tempted to try to run an HP67 (or HP65) from the AC adapter without a battery pack in place. You can damage the (custom) card reader sense amplifier chip. Which is only obtainable from another old machine.
The battery pack is just 3 AA NiCd cells in series. You could just wire up 3 cells and wire them to the contacts in the machine (the contact towards the display end of the machine is -ve). But if you don't want to modify your machine and want a drop-in battery pack, then it's a little harder to make one.
The battery packe are not available new any more, but it's possible to cut open old ones and fit new cells. I believe there are a couple of people who sell rebuilt batteries.

#8

See the thread which begins at:

http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv002.cgi?read=3885


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