BATTERY AND DEVICE

The embodiments of the application provide a battery and a device. The battery includes at least two battery units, wherein the battery unit is provided with a casing and two electrode connecting portions which are arranged on two sides of the casing and have opposite polarities, and the battery units include a first battery unit and a second battery unit which are connected in series; a conductive component arranged on one side of the casing and for being electrically connected to one of the two electrode connecting portions of the first battery unit and the casing of one of the first battery unit and the second battery unit; and a signal detection component arranged on the other side of the casing. The embodiments of the application can simplify the wiring of the signal detection circuit, improve reliability of the signal detection circuit, and then improve safety performance of the battery.