There is a guy in the UK selling a collection of 26 vintage LED calculators on ebay including a couple of HPs.
See http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=3066699971&category=3284
Look at this comment for testing his HP units to see if they work!
Quote:"I pressed a 9v battery to the terminals and it powered up and tunctiones worked but I don't think it's the right battery for it".
Do you think this is good for the calculators?
Larry
Edited: 20 Dec 2003, 5:42 p.m.