The disclosure relates to a battery assembly and an electronic device having the same, wherein the battery assembly is electrically connected to battery contact. The battery assembly includes a battery body, battery terminal, and first insertion portion. The battery terminal is disposed on the battery body, and the first insertion portion is slidably disposed on the battery body. The first insertion portion is removably inserted into an idle space formed in the battery contact so that at least part of the battery contact is clamped by the first insertion portion and the battery terminal.