2 x Energizer 3v Lithium Batteries 1620 ALSO KNOWN AS: CR1620 CR-1620 DL16202 ECR1620 DL1620 DIAMETER: 16.0mm THICKNESS: 2.0mm VOLTAGE: 3V Energizer has been a worldwide leader in small electronics batteries for decades. You can rely on the precision engineering of Energizer batteries to power all of your small electronic devices including: books, games, personal organisers, electronic games and toys, computers, personal care, calculators, keyless entry, garage openers, digital thermometers, blood pressure monitors, home health.