The M12 cutoff tool is a great lesson in underestimation and using the right tool for the job. What you may think is an underpowered battery hog could actually be the key
Can I use a wire wheel in the m12 cut off tool : r/MilwaukeeTool
Milwaukee 2522-20 M12 Fuel 3-Inch Compact Cut Off Tool (Bare Tool Only - Battery and Charger Not Included), Red : Amazon.co.uk: DIY & Tools
Milwaukee M12 FUEL 76mm Cut Off Tool 1 x 6.0Ah, 1 x 2.0Ah | Toolstation
Milwaukee M12 Cut Off Tool Review - Tools In Action - Power Tool Reviews