Cell, battery, and electric device

A cell, comprising an electrode assembly and an electrode terminal, wherein

• the electrode assembly comprises a top and a bottom arranged opposite to each other along a first direction, and the electrode terminal is connected to the top;
• the electrode assembly is formed by winding or stacking, and the electrode assembly comprises N layers of separators, N being a natural number greater than or equal to 3;
• each layer of the separators comprises a first extension portion extending out of the bottom along the first direction, the first extension portions of the N layers of separators are arranged along a second direction;
• and along the second direction, the first extension portion of a first layer of separators to the first extension portion of the (N−1)-th layer of separators are bent, with the first extension portions of adjacent layers of separators being connected to each other;
• the each layer of separators comprises a second extension portion extending out of the top along a direction opposite to the first direction, the second extension portion being connected to the electrode terminal;
• and
• the second direction is a thickness direction of the electrode assembly.