Geeeeez. And I thought I'd never see the power triangle here!!!
Simply put. Think of this. A battery. Has voltage but where is it going? Current is the flow. Voltage is the power behind that flow.
Back to the water. The aforementioned bucket of water holds five gallons. But until u pour it. Put a hole in it or a tube for the water to go some where...the five gallons stay there. Voltage.
Put a hole in it. The five gals will flow out...a bigger hole. Faster flow. Current.
The relationship of the volts and the current create power. But volts and current as everyone has stated ...are different. .