An electrical breaker responsive to a fault condition for one or more battery cells coupled to a battery management system, the breaker comprises: a first terminal configured to be electrically connected to a first electrode of a battery cell when a fault condition of the battery cell is detected by the management system: characterized in that the breaker further comprises: a second terminal configured to be electrically connected to a terminal of a first discharge resistor; a third terminal electrically connected to a terminal of a second discharge resistor, wherein the other terminals of the first and the second discharge resistors (205b, 205a) are configured to be electrically connected to a second electrode of the battery cell; the first discharge resistor and the second discharge resistor have different resistive values; and a thermally-activated switch disposed between the first terminal and the second and third terminals (T2, T3), wherein the switch has a first operating condition in which the first terminal is electrically connected to the second terminal defining a first electrical current pathway, and the switch has a second operating condition in which the first terminal is electrically connected to the third terminal defining a second electrical current pathway, and wherein the switch is triggered to pass from the first operating condition to the second operating condition when the first pathway undergoes overcurrent in which the current flowing in the first pathway exceeds a current threshold, or undergoes overtemperature in which the temperature in the first pathway exceeds a temperature threshold. a first terminal configured to be electrically connected to a first electrode of a battery cell when a fault condition of the battery cell is detected by the management system: characterized in that the breaker further comprises: a second terminal configured to be electrically connected to a terminal of a first discharge resistor; a third terminal electrically connected to a terminal of a second discharge resistor, wherein the other terminals of the first and the second discharge resistors (205b, 205a) are configured to be electrically connected to a second electrode of the battery cell; the first discharge resistor and the second discharge resistor have different resistive values; and a thermally-activated switch disposed between the first terminal and the second and third terminals (T2, T3), wherein the switch has a first operating condition in which the first terminal is electrically connected to the second terminal defining a first electrical current pathway, and the switch has a second operating condition in which the first terminal is electrically connected to the third terminal defining a second electrical current pathway, and wherein the switch is triggered to pass from the first operating condition to the second operating condition when the first pathway undergoes overcurrent in which the current flowing in the first pathway exceeds a current threshold, or undergoes overtemperature in which the temperature in the first pathway exceeds a temperature threshold. a second terminal configured to be electrically connected to a terminal of a first discharge resistor; a third terminal electrically connected to a terminal of a second discharge resistor, wherein the other terminals of the first and the second discharge resistors (205b, 205a) are configured to be electrically connected to a second electrode of the battery cell; the first discharge resistor and the second discharge resistor have different resistive values; and a thermally-activated switch disposed between the first terminal and the second and third terminals (T2, T3), wherein the switch has a first operating condition in which the first terminal is electrically connected to the second terminal defining a first electrical current pathway, and the switch has a second operating condition in which the first terminal is electrically connected to the third terminal defining a second electrical current pathway, and wherein the switch is triggered to pass from the first operating condition to the second operating condition when the first pathway undergoes overcurrent in which the current flowing in the first pathway exceeds a current threshold, or undergoes overtemperature in which the temperature in the first pathway exceeds a temperature threshold.