Battery apparatus and electronic device

Abstract

A battery apparatus comprises: a housing, a cell and an electric connector; the cell is provided inside the housing, is connected to the housing, is in a spirally wound structure, and comprises a positive plate and a negative plate, a length of the negative plate being greater than that of the positive plate to form a redundant length; the housing comprises a positive end-face which is opposite to one end-face of the cell, and a negative end-face which is opposite to the other end-face of the cell; the electric connector is provided around a middle part of the positive end-face and/or the negative end-face and has a first end and a second end spaced apart, the first end being connected to the positive end-face and/or the negative end-face, and the electric connector is configured for weakening or cancelling a magnetic field generated by the redundant length of the negative plate. (FIG. 1)

Dependencies are inferred from the claim text.