A case for protecting a battery and an electronic device having the same are provided. The case includes a main body, a circumferential wall and a waterproof element. The main body includes a first side surface. The circumferential wall connects with the first side surface, extending along a first direction away from the first side surface, and includes a circumferential groove. The circumferential groove is around the circumferential wall and concavely disposed on an outer wall surface of the circumferential wall. The waterproof element includes a circumferential basal portion disposed in the circumferential groove and a circumferential raised portion disposed on an outer surface of the circumferential basal portion and corresponding in position to the circumferential groove. The circumferential raised portion includes a first segment and a second segment opposite to the first segment and farther from the first side surface than the first segment.