"The charges are like water in a stream or pipe.

The current is how much water is flowing through the stream or
pipe at some place.

Voltage is like the height of the stream or pipe. Naturally, the water will flow from a high place to a low place.
To get it from a low place to a high place, you must put energy into it, either using a pump, or a lot of buckets.
Once there, the water has a lot of energy. As it flows back to the low place, the energy will be changed into sound (think of a waterfall), heat (friction of the water on the stream bed) or motion of leaves or other things the water might hit."