Mutual inductor polarity tester

The invention discloses a mutual inductor polarity tester which comprises a base body, a battery charging system, a left test wire winding assembly, a right test wire winding assembly, a battery mounting sleeve, a hand-pressing contactor, an output current adjusting button, a pointer meter and a handle. The left test wire winding assembly and the right test wire winding assembly are the same in structure and are fixedly installed on the left side and the right side of the base body respectively, the battery installation sleeve is located above the base body, the hand-pressing contactor and the pointer meter are located below the base body, and the output current adjusting button is arranged on the side edge of the pointer meter. The mutual inductor polarity tester is provided with a rechargeable lithium battery, supports batteries of different types and sizes, is wide in application, is provided with an output current adjusting button, can adjust the output current of the battery according to the capacity of