The present application provides a battery including: a battery cell including a battery cell body and a tab extending from the battery cell body; a case located at a periphery of the battery cell and formed with a top sealing edge, a side sealing edge and at least one protruding portion at edges of the battery cell body; and a protection board located on a side of the top sealing edge facing away from the top end face, and including a first region and a second region, where a height of the second region is greater than that of the first region; and the second region is connected with the tab, and the second region is disposed in a staggered manner with the protruding portion in a width direction of the battery cell body.