Two electrodes participate
Oxidation and reduction reactions occur at different electrodes.
Ions move internally
The electrolyte allows ionic charge to move inside the cell while electrons travel through the external circuit.
Voltage comes from chemistry
Different electrode and electrolyte combinations produce different cell voltages and behaviours.
Rechargeable cells reverse key reactions
An external power source drives the chemistry back toward a higher-energy state.
This page explains scientific concepts for general learning. It does not replace laboratory safety procedures, professional engineering guidance, or individualized medical advice.