Battery

The utility model provides a battery which comprises a battery shell, the battery shell comprises a cylindrical first pole shell with only one open end, a second pole shell and a sealing ring are arranged at the port of the first pole shell, an annular gap is formed between the first pole shell and the second pole shell, and the sealing ring is arranged in the annular gap. The sealing ring is located in the annular gap and separates the first pole shell from the second pole shell, the sealing ring is externally connected with a flexible easy-to-pull object, one end of the flexible easy-to-pull object is fixedly connected with the sealing ring, and the other end of the flexible easy-to-pull object is exposed and suspended. According to the utility model, the battery is convenient to take out, and the flexible easy-to-pull object is fixedly connected with the sealing ring without occupying any area on the surfaces of the first pole shell and the second pole shell, so that the battery can be arranged in the batt