Working robot

A working robot configured to move and work autonomously, comprising:

• a working mechanism configured to work;
• a movement mechanism configured to move the working robot;
• a working motor configured to drive the working mechanism;
• a movement motor configured to drive the movement mechanism;
• a battery that is rechargeable and configured to supply power to the working motor and the movement motor;
• a voltage detection unit configured to detect a voltage value of the battery;
• and
• a control unit,
• wherein
• the control unit is configured to execute:
• a two-step obtainment process in which the control unit obtains a detection value detected by the voltage detection unit while a target motor is in operation as a first-step voltage value, and then the control unit stops the target motor and obtains a detection value detected by the voltage detection unit while the target motor is not in operation as a second-step voltage value, wherein the target motor is at least one of the working motor and the movement motor;
• and
• a return determination process in which the control unit determines whether to return the working robot to a charging station or not based on the first-step voltage value and the second-step voltage value.