Re: Sting curiosity Message #10 Posted by Katie Wasserman on 30 June 2010, 11:57 a.m., in response to message #9 by Michael Meyer
Michael,
I moved to using AAA and AA primary lithium cells to solve this issue.
For the classics, I made up a bunch of replacement battery packs using a 3xAAA plastic battery holder and glused metal contacts to the bottom of the holder. This fits nicely in the battery compartment.
For the spices, woodstocks and stings the solution was to just use AA lithium cells in place of the nicads.
For the topcats I used a 4xAAA plastic battery holder glued on top of one-half of the standard topcat battery pack plastic frame, with metal contacts like the classics.
So all the LED (HP and non-HP) calculators in my collection now have replaceable lithium cells that will hopefully never leak and not self discharge for many years.
But.... I remember your problem with your 19C not liking the slightly higher voltage of the AA lithium cells. I haven't had that problem yet, but it's something to be aware of.
-Katie
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