Raspberry pi Power Supply Issues Powered USB Hub for Gertboard and Peripherals

In this video I try several different power supplies or chargers to show the various effects they can have on the Raspberry pi. It appears that more amps is better. A Powered USB Hub seems to be best. The one I use is 5V and 2.5A. The quality of the power supply makes a big difference especially when using multiple Raspberry Pi's, Development Boards or add on Boards like the Gertboard.