The Panasonic CR2016 is a lithium coin cell battery designed to provide reliable power for a variety of small electronic devices. Utilizing lithium manganese dioxide chemistry, these 3V primary cells offer a capacity of 220 mAh, making them a dependable choice for powering watches and remote controls. Each battery measures 20.0 mm in diameter and 1.6 mm in height, fitting precisely into compact slots where space is limited. This pack contains four non-rechargeable batteries, which are produced with 0% added mercury to be more environmentally conscious. To ensure a safe home environment, the batteries come in specialized child safety packaging.