I do not succeed in charging one of my 3 batteries anymore. When I plug it to the BR2 charger, no matter what mode I chose (charge, balance charge, discharge etc), it outputs “Vout over” as if I had an over voltage in one of the cell maybe. I used the battery for a mission just before, it is at 15.5V roughly.
Does it mean this battery is dead? What can I do otherwise?