Obstacle robot

What power supply can i use for powering my whole robot?

More details please

I am using Arduino uno board to program the obstacle avoiding robot. So what power source would be appropriate? I used 9v battery but due to voltage irregularity or slight discharge it did not run. So what power source would be appropriate.

If the 9V battery was a PP3 then I am not surprised it did not work as they are not designed to provide high current

Try 6 AAs in a battery pack

What is "hole robot"? If it is an 8 ton vehicle You might need a 1 ton 48 volt 1200 Ah battory.