12 cell li-on discharged manually overnight to 0.00v (discharged across 10.6V path), after discharge the center 4 cells appear open and will not accept a charge, the 4 cells at either end charge satisfactorily. Seems weird that 4 cells (paralleled) would all open. Any ideas other than the discharge rate was too high? I will add that I first tried charging across the 10.6V path @ about 10.8V for a while. I was hoping to create a 'static' charge that would enable a normal charging via power adapter.
At no time did I notice heating of any of the 12 cells.
Many comments, thanks for all.
Clarification: The symptom is "Open" not "shorted", attempting to manually charge just this 4 cell section (3.6v) of the battery pack @ 3.8v results in no charge. The other 2 sections accept the charge just fine, or seem to at this point. Heat is not now, nor has it been an issue.
I think the information that there is built into the battery itself protection for "over" discharging fits, as the statement includes it can cause the battery to appear "open". The suggestion that only a battery analyzer could restore this battery (section) is interesting. Any idea as to what an analyzer would apply to this battery to bring back functionality? Lower,..higher voltage,.. pulsed dc,...?