I'm trying to understand voltage and there is a site that says that the battery do work to a positive charge to move it from the low potential terminal (negative) to the high potential terminal (it gains potential energy doing that):
"The battery simply supply the energy to do work upon the charge (positive charge) to move it from the negative terminal to the positive terminal. By providing energy to the charge, the cell is capable of maintaining an electric potential difference across the two ends of the external circuit."
(from the beginning of the fifth paragraph from this site : http://www.physicsclassroom.com/class/circuits/Lesson-1/Electric-Potential-Difference )
Maybe my question is silly but it says that the battery do work on the positive charge to move it from the negative to positive side, but my understanding of a battery is that it creates an electric field and the positive charge in the high potential terminal is full of potential energy and the charge naturally move from the positive side to the negative side (to lose potential energy like for gravity), but the text says it's the other way around.