An electronic device may include a processor, and a battery configured to supply power to the processor. The battery may include multiple first electrodes including first tabs configured to protrude toward a first direction, multiple second electrodes including second tabs configured to protrude toward the first direction, and a separator configured to restrict contact between the multiple first electrodes and the multiple second electrodes. The separator may include a first separator configured to be folded in a second direction perpendicular to the first direction or a fourth direction opposite to the second direction, the first separator including multiple through-holes configured to accommodate the first tabs and the second tabs, and a second separator configured to be folded in the first direction or a third direction opposite to the first direction, the second separator being alternately stacked with the first separator. In addition, various embodiments may be possible.