I'm trying to build my own battery pack as part of an electric scooter project I'm working on. The motor I have is 200W 24V and is rated at 11 A. I've explored using 6 18650 Lithium ion cells for this, but it still doesn't produce 200W because these cells are 2600 mAh and there aren't any 18650s that will give me 11 A. Also tried using 3 9V batteries but those are 8 milliamperes which does not work at all. Any suggestions? How should I go about powering this motor? What kinds of cells should I use? I'd like to make my own battery pack instead of buying them.