If you want to figure out what kind of battery you need, you must know two things:
1) How much power everything is drawing. You don't know that. Or at least you haven't mentioned it here.
2) How long you want this to operate between battery charging or replacing.
Also helpful to know:
3) What kind of constraints on size (volume, weight) you have for this project.
4) Whether you want to use rechargeable or replaceable (non-chargeable) primary cells.
1) I am not sure but I can find out, to give you a visual its simply just 12 pins used with 8 leds and 4 pushbuttons.
2) Not applicable as I just want to demonstrate this once.. For instance like carrying a 9v battery and just plugging it in when i need to use it. A single demonstration will take less than a minute.
3) just a breadboard and the UNO with some compartment for the battery.
4) i imagine just using a 9V
thank you for the fast response