BATTERY CELL AND BATTERY

This disclosure relates to a battery cell and a battery, the battery cell comprising a first electrode piece and a second electrode piece, the first electrode piece and the second electrode piece being stacked and coiled together; an end of the first electrode piece comprises a single-side coating area at the interior of the battery cell; the battery cell comprising a correction side being one of opposite sides thereof, spaces are formed between side edges of the second electrode piece and a side edge of the battery cell, and the side edges of the second electrode piece located on the innermost side of the battery cell are offset toward the correction side, with respect to the side edges of the second electrode piece located on the outermost side of the battery cell. The battery cell provided in the present disclosure can improve the energy density of the battery.