Introducing the Spare Battery for CIPHERLAB devices, designed to provide reliable power for your 1661, 1662, 1663, 1664, 1661H, 1662H, and 1664H models. With a capacity of 3.7V and 850mAh, this battery ensures long-lasting performance to keep your devices running smoothly. Manufactured by CIPHERLAB CO., LTD., this high-quality replacement part, with the manufacturer part number KB16XX0X00501, is the perfect solution for maintaining the efficiency of your equipment. Stay powered up and ready to go with this essential accessory.