A power tool and a method of operating a power tool. The power tool can include a housing supporting a motor, a switch assembly, and a fuel gauge. The method can include the acts of activating the switch assembly to electrically connect the motor and a battery, measuring a state of charge of the battery, displaying the state of charge on the fuel gauge before electrically connecting the motor and the battery, and stopping the display of the state of charge before deactivating the switch assembly.