The invention is directed toward a battery pack. The battery pack includes at least one electrochemical cell; a case; a plate; an indicator circuit; and a battery-to-internal volume ratio. The case includes at least one open end. The plate is placed over the at least one open end. The plate includes a terminal plate, a base plate, or any combination thereof. The indicator circuit includes an integrated circuit and an antenna. The indicator circuit is affixed to the plate. The battery-to-internal volume ratio is greater than about 0.52.