Still a mystery to me! Message #12 Posted by Michael Meyer on 6 Feb 2010, 3:43 p.m., in response to message #11 by Katie Wasserman
Katie... you could be right, and I had thought about that. But I'm afraid it might take some more time to solve this puzzle because they are both starting up easily while I try to figure this out.
I tested each of the lithium cells... they put out between 6 and 7 amps each, and over two amps in the packs. So, providing enough power wouldn't seem to be the problem. And, of course, both calculators ran perfectly last night. I ran them both for quite a while, printing listings, etc.
This morning, one would not turn on. When I hooked up the pack externally with leads, the calculator turned on. Some kind of stubborn contact problem? Or no over-voltage problem because they haven't sat long enough.
I'll have to wait a few days and then see if they'll start if hooked up externally and if not, if they'll start with 3 cells fed in instead of 4.
If it's still a problem with the battery contacts, why would they work so reliably once turned on, only to quit and be so stubborn after a few days? And why would NiMH cells work when the lithium cells are causing problems? Your answer could be correct. I'll give your over-voltage theory a try when they stop working again....
Such a strange, annoying, and stubborn mystery that I should be smart enough to figure out!
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