Milwaukee M18 FUEL 18V Lithium-Ion Brushless Cordless 1 in. SDS-Plus Rotary Hammer with 10 in. Bull Point & Steel Flat Chisel 2912-20-48-62-6080 - The Home Depot
CR2412 Battery Lithium 3V - AussieBattery
Coin Cell Cross Reference
Watch Batteries are available on best price at Universal Watch Parts