Sony Coin Cell Battery CR1616 3V Lithium Replaces DL1616, ECR1616
Amazon.com: Duracell 1616 3V Lithium Battery, 1 Count Pack, Lithium Coin Battery for Medical and Fitness Devices, Watches, and more, CR Lithium 3 Volt Cell : Health & Household
Amazon.com: Duracell 1616 DL1616 CR1616 DL1616B2PK Coin Cell Watch Battery 3.0 Volt Lithium, 2 Count (Pack of 1) : Health & Household