The invention discloses a battery pack loaded on an electric device, including a battery housing for accommodating at least one battery cell; and a terminal end including: a plurality of terminal end members; a plurality of terminal end configuration grooves where the plurality of terminal end members are arranged; a terminal end housing where the plurality of terminal end configuration grooves are arranged, wherein the terminal end configuration grooves have openings towards two adjacent side surfaces of the terminal end housing, and wherein the terminal end is arranged at a position off-set relative to the battery housing.