For an upcoming competition, I must construct a vehicle that is capable of travelling at high speeds and can travel precise predetermined distances. While any electrical components may be used, any and all circuitry can only be powered by a single 9V battery. I am currently using a rather rudimentary set-up: 2 DC motors controlled by an Arduino microcontroller, powered in parallel by a 9V duracell battery. I was wondering if any of you guys had any ideas on how I could improve such a system in terms of circuitry/electrical components. Some ideas: Better battery - Other battery types may allow me to draw higher current and thus greater power. Any suggestions on specific types? Better motors - A DC motor isn't incredibly fast not precise. I was considering a brushless DC motor simply because they provide very high rpm - can stepper motors provide similar high speeds along with their inherent high precision? A vast majority of brushless motors available on the internet don't seem to come at 9V - would it be worth it to step up the voltage to use higher voltage motors, despite the loss in power? Any other suggestions? I am not the most familiar with circuitry, so I would appreciate any suggestions. Thank you.