From: Katie Wasserman
Email:
I don't think that you'll find a working replacement battery pack anywhere for this calculator, it's from 1972! But assuming that you still have the old pack, you can replace the 4 AA nicads inside of it and get it working again. You'll need to cut along the seam with a sharp knife then pry it open. You can use nicad AA batteries as replacements or nimh AA batteries both are easy to find and you'll need to do a bit of soldering too. Alternatively you can have the pack rebuilt for you at one of several places including: http://nicdlady.com/sendingus.html and http://www.batteriesplus.com
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