What are the reasons for the zero voltage of lithium-ion batteries?
A short circuit affected the battery badly, and it got a dead cell, and now it shows 0 volts. You charged the battery with a faulty charger, and you keep using the battery instead,
A short circuit affected the battery badly, and it got a dead cell, and now it shows 0 volts. You charged the battery with a faulty charger, and you keep using the battery instead,
The charged cell can dump dozens of amps into the uncharged cell, probably setting the uncharged cell on fire, and permanently damaging the charged cell. Batteries discharged to 0v
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