A battery cover assembly includes a housing (1), a connecting member (20), a cover (3), a latching section (6), a compression spring (7), a gearing member (8), and a button (9). The housing has a sliding track (112) and a through hole (110) defined therein. The cover is rotatably engaged with the housing via the connecting member. The cover includes a claw (32) and a button hole (36). The latching section is slidably engaged with the housing. The latching section includes a stand arm (642) and a claw hole (622). The compression spring connects both with the housing and the latching section. The gearing member is mounted to the housing, and comprises a gear (81) and a rack (83) engaged with the gear. The rack defines a locking hole (830) engaging with the stand arm. The button engages with the gear and extends through the button hole.