A battery cover assembly is using for accommodating a battery therein. The battery cover assembly comprises a housing, a battery cover, and a elastic member. The housing has a depressed portion, a space and a latching trough defined therein. The depressed portion is configured for accommodating the battery therein. The battery cover is configured for covering the depressed portion of the housing. The battery cover has a shaft and a latching portion protruding therefrom. The shaft is corresponding to the space of the housing. The shaft is rotatably held in the space to rotatably latching the battery cover with the housing. The latching portion is corresponding to the latching trough of the housing. The latching portion is latched within the latching trough. The elastic member is fixed between the housing and the battery cover. The elastic member provides an elastic force for rotating the battery cover relative to the housing.