I sent some Dionics to John Ritter for recelling (shout-out for his always-excellent service!). He gave me some valuable information that I thought I'd pass along. This is my paraphrase...
Pre-2010 Dionics were constructed in such a way that some solder joints inside the case could break fairly easily with the batteries being jostled around. When this happens the display goes dead as the battery's protection circuit kicks in. The battery won't recharge or respond at all.
The thing is, the cells are still probably just fine....but if you put the battery on a shelf thinking it's already dead, then the cells will slowly self-discharge and eventually they will be irretrievably lost. But if you catch it right away, John can do a fairly inexpensive repair to "save" the battery.
As I understand it, more recent Dionics have been revised to make this problem much less common.
Dionic repair tip
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