Abstract: A battery cover includes an outer panel, an inner panel, a resilient member and a chassis. The inner panel is disposed on the outer panel. The resilient member is located on the inner panel and includes two elongated arms. Each elongated arm includes a contact at the distal end thereof. The chassis is disposed on the resilient member and the inner panel, and is fastened to the outer panel. The chassis defines two openings configured for the two contacts to extend out correspondingly.

Abstract: A battery cover includes an outer panel, an inner panel, a resilient member and a chassis. The inner panel is disposed on the outer panel. The resilient member is located on the inner panel and includes two elongated arms. Each elongated arm includes a contact at the distal end thereof. The chassis is disposed on the resilient member and the inner panel, and is fastened to the outer panel. The chassis defines two openings configured for the two contacts to extend out correspondingly.

Abstract: An exemplary button device includes a cover and a push button. The cover includes a main body with an opening defined therein, two spaced blocks, and a post extending from the main body between the blocks. The push button includes a positioning portion with a through hole defined therein for extension of the post, a pressing portion with a key top accommodated in the opening, a connecting portion for connecting the pressing portion to the positioning portion, and two wings stretching from opposite edges of the positioning portion adjacent to the connecting portion into a space between the blocks and the main body respectively. The positioning portion forms a protrusion which resists against the main body and separates the push button from the main body.

Abstract: An exemplary button device includes a cover and a push button. The cover includes a main body with an opening defined therein, two spaced blocks, and a post extending from the main body between the blocks. The push button includes a positioning portion with a through hole defined therein for extension of the post, a pressing portion with a key top accommodated in the opening, a connecting portion for connecting the pressing portion to the positioning portion, and two wings stretching from opposite edges of the positioning portion adjacent to the connecting portion into a space between the blocks and the main body respectively. The positioning portion forms a protrusion which resists against the main body and separates the push button from the main body.