Milwaukee M12 12-Volt Lithium-Ion XC High Output 5.0 Ah Battery Pack 48-11- 2450 - The Home Depot
Amazon.com: Duracell 2450 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: BATTERY WTCH/ELEC 2450 (Pkg of 4) : Health & Household