A battery protection circuit, comprising: a voltage supply circuit to be directly electrically connected to a first electrode of a battery cell ; a first resistor (R1) including a first terminal electrically connected to the voltage supply circuit; a charging controller including a power supply terminal (Vcc) and a charging control terminal (CHG), wherein the voltage supply circuit is configured to supply power to the power supply terminal (Vcc) and the first terminal of the first resistor (R1), and the charging controller is arranged to generate a charging control current from the supplied power and to output it through the charging control terminal (CHG); a first charging transistor including a gate terminal, a first terminal and a second terminal; a second resistor (R2) connected as a pull-down resistor between the gate terminal and the first terminal of the first charging transistor ; and a current voltage converter connected to a second terminal of the first resistor (R1) and to the charging control terminal (CHG), to perform electrical connection of the voltage supply circuit to the gate terminal of the first charging transistor through the first resistor (R1) depending on the charging control current (I200), wherein the current voltage converter is configured to change a voltage level of a voltage signal applied to the gate terminal of the first charging transistor according to a current level of the charging control current (I200) to enable or disable the first charging transistor , wherein the second terminal of the first charging transistor is to be directly electrically connected to a second electrode of the battery cell , thereby being the first charging transistor in series with the battery cell, and wherein the second resistor (R2) has a resistance value greater than that of the first resistor (R1) such that a time constant related to the enable and disable speeds of the first charging transistor is determined based on a resistance value of the first resistor (R1). a voltage supply circuit to be directly electrically connected to a first electrode of a battery cell ; a first resistor (R1) including a first terminal electrically connected to the voltage supply circuit; a charging controller including a power supply terminal (Vcc) and a charging control terminal (CHG), wherein the voltage supply circuit is configured to supply power to the power supply terminal (Vcc) and the first terminal of the first resistor (R1), and the charging controller is arranged to generate a charging control current from the supplied power and to output it through the charging control terminal (CHG); a first charging transistor including a gate terminal, a first terminal and a second terminal; a second resistor (R2) connected as a pull-down resistor between the gate terminal and the first terminal of the first charging transistor ; and a current voltage converter connected to a second terminal of the first resistor (R1) and to the charging control terminal (CHG), to perform electrical connection of the voltage supply circuit to the gate terminal of the first charging transistor through the first resistor (R1) depending on the charging control current (I200), wherein the current voltage converter is configured to change a voltage level of a voltage signal applied to the gate terminal of the first charging transistor according to a current level of the charging control current (I200) to enable or disable the first charging transistor , wherein the second terminal of the first charging transistor is to be directly electrically connected to a second electrode of the battery cell , thereby being the first charging transistor in series with the battery cell, and wherein the second resistor (R2) has a resistance value greater than that of the first resistor (R1) such that a time constant related to the enable and disable speeds of the first charging transistor is determined based on a resistance value of the first resistor (R1). <EOS>