Cord to Cordless Jigsaw Conversion from 110V to 18V | RYOBI MJ-21

I have 5 electric jigsaws that runs with 110V. It is hard for me for working outside or far away from electric source. I decide to choose one of them and convert it into cordless power tool. “In condition I fail, I still have 4 tools left, but if I succeed I learn something new and have video for you“ this is what think before I start the project. DC motor Price 4$ The new original 775 high-power DC motor, both front and rear are ball bearings, the rated voltage is DC18V, 17400 rpm (can also be used for 12V or 24V), high-speed and large torque, originally estimated to be used on power tools. Motor diameter: 42mm Motor height: 67mm Shaft diameter: 5 mm (4mm in flat position) Output shaft length: 14.5 mm Weight: 350 grams Rated voltage: DC18V No-load current: A No-load speed: 17400 RPM DC12V current: 1.3 A No-load speed: 11300 rpm DC24V current: A No-load speed: 23500 rpm Battery adapter I bought this adapter form China price 4$