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Amazon.com: Duracell 2430 3V Lithium Battery, 1 Count Pack, Lithium Coin Battery for Medical and Fitness Devices, Watches, and more, CR Lithium 3 Volt Cell
CR2430 Battery, 2430 3V Lithium Button Cell Coin Batteries for Remote Control Smartwatches Car Key Fob Clock (10 Pack) : Amazon.ca: Health & Personal Care