A power storage device includes an electrode body, an electrode terminal connected to the electrode body, and an exterior body that seals the electrode body. The exterior body is configured from a film-like exterior member and includes a first sealing port...

A resin film for a power storage device constituted of two or more layers, and said two or more layers include: at least one layer of a layer A having a content of a water absorbent of at least 5 mass %; and at least one layer of a layer B having a content...