Embodiments of this application provide a battery, an electric apparatus, and a method and an apparatus for preparing a battery. The battery includes: a battery unit, including a plurality of battery cells, where the plurality of battery cells are arranged in a first direction and electrically connected to each other, each of the battery cells includes a can and two electrode terminals of opposite polarities, the two electrode terminals are respectively disposed at two ends of the can in the first direction, and at least one of the electrode terminals protrudes from the can in a direction leaving an interior of the battery cell; and a sampling member, where the sampling member is at least partially located between two adjacent ones of the battery cells, connected to the electrode terminals protruding from the can, and configured to perform signal collection on the connected battery cells.