An electrical combination, the electrical combination comprising a power tool and a battery pack , the power tool comprising: a power device configured to use electric energy to realize a power tool function; a capacitor connected with the power device; a first tool connector connected with a first terminal of the capacitor ; and a second tool connector connected with the first terminal of the capacitor ; and a third tool connector connected with a second terminal of the capacitor ; and the battery pack comprising: a battery comprising a positive electrode and a negative electrode; a first battery pack connector connected to the battery and for connecting with the first tool connector ; and a second battery pack connector connected to the battery and for connecting with the second tool connector ; and a third battery pack connector connected to the battery and for connecting with the third tool connector ; characterized in that : the battery pack comprises: a resistor connected between the battery and the first battery pack connector for limiting the current flowing into or from the battery through the first battery pack connector and having a resistance greater than between the second battery pack connector and the battery ; wherein the first battery pack connector and the second battery pack connector are both connected with one of the positive electrode or the negative electrode and the third battery pack connector is connected with the respective other electrode and wherein when the battery pack is coupled to the power tool , the first , second , and third tool connector and the first , second , and third battery pack connector are arranged such that the first tool connector contacts and connects to the first battery pack connector and then the connection of the third tool connector and the third battery pack connector is in advance of the connection of the second tool connector to the second battery pack connector . a power device configured to use electric energy to realize a power tool function; a capacitor connected with the power device; a first tool connector connected with a first terminal of the capacitor ; and a second tool connector connected with the first terminal of the capacitor ; and a third tool connector connected with a second terminal of the capacitor ; and a battery comprising a positive electrode and a negative electrode; a first battery pack connector connected to the battery and for connecting with the first tool connector ; and a second battery pack connector connected to the battery and for connecting with the second tool connector ; and a third battery pack connector connected to the battery and for connecting with the third tool connector ; characterized in that : a resistor connected between the battery and the first battery pack connector for limiting the current flowing into or from the battery through the first battery pack connector and having a resistance greater than between the second battery pack connector and the battery ; wherein the first battery pack connector and the second battery pack connector are both connected with one of the positive electrode or the negative electrode and the third battery pack connector is connected with the respective other electrode and wherein when the battery pack is coupled to the power tool , the first , second , and third tool connector and the first , second , and third battery pack connector are arranged such that the first tool connector contacts and connects to the first battery pack connector and then the connection of the third tool connector and the third battery pack connector is in advance of the connection of the second tool connector to the second battery pack connector . <EOS>