Hi everyone. I am very new to the world of microcontrollers so I barely know anything. I have a quick question: Is a 9.6V 2000mAh battery ok to power my arduino uno board? And I would just have to connect the ground and the positive wires directly into the arduino ground and Vin pins right?
Yes, it will work...depending on what you're going to connect to it. If you try to suck maximum current out of every Arduino pin then you might run into problems.
PS: Poking a wire into the Vin connector will work but you'll get a much solid connection with a proper power connector plug.