In an insulating sheet, a first left-side piece portion, a second left-side piece portion, a left-side bottom piece portion, a first left-side connection portion, and a second left-side connection portion form a first communication path for communicating i...

A battery includes an electrode assembly, a housing, and a terminal post, where the electrode assembly is accommodated in the housing. The housing includes a first wall and a second wall disposed opposite each other along a first direction and includes a p...