Excessive discharge of nickel cadmium battery
A fatal injury of nickel cadmium battery is excessive discharge. Setting the discharge termination voltage under this condition will not only have no power to drive the load, but also damage the battery life.
Moreover, once the voltage is inadvertently reduced to almost equal to 0V, it may be too late to stop the discharge and remove the load. The voltage of the battery can no longer rise automatically, and the general charger can no longer charge the electricity. Its voltage will remain fixed at 0V.
At the moment, it is paralyzed like a stroke. Let alone lose its life, it often dies. Alas, it can no longer be used.