Can a current flow in a battery?

Maybe something like "Current flow in batteries?" Actually a current will flow if you connect a conductor to any voltage, through simple electrostatics.

Is it possible to control power from a battery?

Your question suggests that you are far from qualified to do so given the risks involved. Power is seldom controlled. Power has two components. Electrical power from a battery is voltage multiplied by current. You can control voltage or current relatively easily, but it is difficult and generally not desirable to control both at the same time.

How does a battery produce electricity?

“The ions transport current through the electrolyte while the electrons flow in the external circuit, and that’s what generates an electric current.” If the battery is disposable, it will produce electricity until it runs out of reactants (same chemical potential on both electrodes).

Why do batteries need to be connected in a circuit?

With this analogy, it is plainly obvious why both the positive and negative ends of a battery must be connected in a circuit. If, say, you connect only the negative electrode to ground, there is no current because there is no electricity coming in on the positive electrode that can be pumped out.

What is the difference between a battery and a circuit?

battery A chemical supply of electrical energy. For example, common battery voltages include 1.5 V and 9 V. circuit A closed loop through which current moves - from a power source, through a series of components, and back into the power source. Originally, current was defined as the flow of charge from positive to negative.

Why does no current flow in a battery?

In your battery example, there is no return current path so no current will flow. There is obviously a more deep physics reason for why this works but as the question asked for a simple answer I'll skip the math, google Maxwell's Equations and how they are used in the derivation of Kirchhoff's voltage law.