My special tip Message #3 Posted by J.C. Boco on 3 Nov 2006, 6:57 p.m., in response to message #2 by Giancarlo (Italy)
One tip that has never let me down is keeping a supply of spare batteries solely for your calculator. In the past I kept 3 brand new "N" batteries for my HP28S on hand, and often would buy another set even before I used my emergency supply.
Now I keep a set of AAA's. Even if someone is in need of a AAA, they get nothing from my special HP battery stash. JC
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