This will work if there is a 'soft' short within the cell, this occurs when dendrites grow on one electrode, pierce the separator and short against the other electrode, effectively short circuiting the cell. Applying 12V at very high current through the soft short burns it away and the cell usually works again… The trouble is that it can sometimes locally melt the separator and makes the cell prone to further internal short circuits which could pose a safety risk
Do this at your own risk!
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