Battery

An electronic device, comprising:

• a battery, wherein the battery comprises:
• an electrode assembly comprising:
• a negative electrode plate comprising a negative electrode current collector and a negative electrode active material layer;
• a positive electrode plate comprising a positive electrode current collector and a positive electrode active material layer;
• and
• a separator disposed between the positive electrode active material layer and the negative electrode active material layer;
• wherein in a first direction, the negative electrode active material layer comprises a first portion and a second portion connected to the first portion, the second portion comprises a first surface and a first end, the first surface is connected to the first portion by using a first connection part, the first end is away from the first connection part and is a terminal part of the negative electrode active material layer, and a thickness of the second portion in a second direction perpendicular to the first direction decreases from the first connection part to the first end in the first direction;
• in the first direction, the positive electrode active material layer comprises a third portion and a fourth portion connected to the third portion, the fourth portion comprises a second surface and a second end, the second surface is connected to the third portion by using a second connection part, the second end is away from the second connection part and is a terminal part of the positive electrode active material layer, and a thickness of the fourth portion in the second direction gradually decreases from the second connection part to the second end in the first direction;
• along a thickness direction of the electrode assembly, the first surface and the second surface are the surfaces of two adjacent layers of positive electrode plate and negative electrode plate;
• and
• the first surface and the second surface are at least partially arranged opposite to each other, and in the first direction, the first connection part is located between the second connection part and the second end.