A battery compartment, comprising: a battery mount having at least two battery mounting grooves spaced apart from each other; a connection electrode on the battery mount and between adjacent battery mounting grooves ; a battery compartment cover detachably connected to the connection electrode ; and a pushing-out assembly on the connection electrode , wherein the pushing-out assembly is configured to provide a force for moving the battery compartment cover away from the connection electrode ; characterized in that , the connection electrode is in a cylindrical shape and has a closed end and an open end opposite to each other, wherein the closed end is located on the battery mount and the open end faces the battery compartment cover , an inner cavity of the connection electrode constitutes a slide slot , and a slider stopper plate is provided at the open end of the connection electrode ; the pushing-out assembly comprises a slider configured to slidably engage with the slide slot and an elastic member located between a bottom of the slide slot and the slider , wherein the slider comprises a body and a protrusion protruding axially from a side surface of the body, the body is inside the slide slot , and the protrusion is outside the slide slot and axially extends out of the slider stopper plate ; in a case that the battery compartment cover is connected to the connection electrode , the slider is sandwiched between the battery compartment cover and the elastic member , and the elastic member is in a compressed state; in a case that the battery compartment cover is detached from the connection electrode , an elastic force of the elastic member is released, such that the battery compartment cover is ejected from a mounting groove by the slider . a battery mount having at least two battery mounting grooves spaced apart from each other; a connection electrode on the battery mount and between adjacent battery mounting grooves ; a battery compartment cover detachably connected to the connection electrode ; and a pushing-out assembly on the connection electrode , wherein the pushing-out assembly is configured to provide a force for moving the battery compartment cover away from the connection electrode ; characterized in that , the connection electrode is in a cylindrical shape and has a closed end and an open end opposite to each other, wherein the closed end is located on the battery mount and the open end faces the battery compartment cover , an inner cavity of the connection electrode constitutes a slide slot , and a slider stopper plate is provided at the open end of the connection electrode ; the pushing-out assembly comprises a slider configured to slidably engage with the slide slot and an elastic member located between a bottom of the slide slot and the slider , wherein the slider comprises a body and a protrusion protruding axially from a side surface of the body, the body is inside the slide slot , and the protrusion is outside the slide slot and axially extends out of the slider stopper plate ; in a case that the battery compartment cover is connected to the connection electrode , the slider is sandwiched between the battery compartment cover and the elastic member , and the elastic member is in a compressed state; in a case that the battery compartment cover is detached from the connection electrode , an elastic force of the elastic member is released, such that the battery compartment cover is ejected from a mounting groove by the slider . <EOS>