Connector, battery, battery pack and electric device

The utility model provides a connector, a battery, a battery pack and an electric device. The connector comprises a body, the body is provided with a first sampling end and a second sampling end which are arranged at an interval, the first sampling end is used for being connected with a first sampling input end of an electrical part, and the second sampling end is used for being connected with a second sampling input end of the electrical part. The current of the connector is determined through the first sampling input end and the second sampling input end. The first sampling end and the second sampling end are arranged on the body at an interval, the first sampling end is connected with the first sampling input end of the electrical part, and the second sampling end is connected with the second sampling input end of the electrical part, so that the current of the connector can be measured; compared with the mode that an extra low-resistance precision resistor is connected to a circuit board in series to sample the current, the circuit resistance of the battery can be reduced, so that the heating value of the battery is reduced, the sampling resistance between the two sampling ends is large, and the accuracy of metering the electric quantity of the battery can be improved.