Panasonic Battery CR-2/3A Cylindrical Lithium Primary Batteries offer a long-life, lithium metal, 3V, 1600mAH cylindrical cell in a 2/3A size, with various lead forms. The CR-2/3A batteries provide a high rate/pulse discharge and PTC for increased safety. These batteries are suitable for infrastructure devices requiring reliable, long-life power in smoke and carbon monoxide detectors, gas and water meters, security devices, iBeacons, and IoT/sensing devices.