Power supply structure of electromotive tool

A power supply structure of an electromotive tool comprising

• a body comprising:
• a clamp at one end of the body;
• and
• an electromotive motor for driving the clamp to rotate;
• a control button installed at one lateral side of the body for controlling the electromotive motor;
• a battery seat being installed at another end of the body;
• the battery seat containing
• a battery;
• a control circuit having an inserting hole;
• a switch for selecting an external power supply and a battery power supply so as to perform at least one operation;
• the operation being at least one of initiating a power supply to supply power to the electromotive tool and charging the battery;
• an over current protection device of a charging circuit for monitoring the charging current to protect the battery from over-current;
• and
• a transformer inserting into the inserting hole for supplying external power into the body;
• wherein by switching the switch of the control circuit to select an external power supply and a battery power supply for supplying power to the body;
• the control circuit serves to divide an external current for actuating the electromotive motor and charging the battery.