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The Challenge: Recharge a Battery

How does a car battery work?

A car battery is also known as a 'Lead Acid' battery. It is constructed of positive electrodes, negative electrodes and an electrolyte. The electrolyte connects the negative and positive electrodes chemically.

A battery only contains a fixed amount of reactants. When a lead acid battery becomes discharged both electrodes undergo chemical changes to form lead sulphate and eventually the battery becomes discharged (dead).

Electron flow from battery to a light bulb