BATTERY CELL, BATTERY, AND ELECTRICAL APPARATUS

A battery cell (7), a battery (2), and an electrical apparatus. The battery cell (7) comprises a casing (20), an electrode assembly (10), and an electrode terminal (30). The casing (20) comprises a wall portion (23). The electrode assembly (10) is accommodated in the casing (20) and comprises tabs (12). The electrode terminal (30) is arranged on the wall portion (23); the side of the electrode terminal (30) away from the electrode assembly (10) in the thickness direction of the wall portion (23) is provided with an outer surface (31), the electrode terminal (30) is provided with a recessed portion (32) recessed from the outer surface (31), the electrode terminal (30) comprises a connecting portion (33) arranged at the bottom of the recessed portion (32), and the connecting portion (33) is electrically connected to the tabs (12).