Electrify Your Future: IGCSE Physics 2026 Electricity Test – Amp Up Your Skills!

A battery is a collection of two or more cells connected together to convert chemical energy into electrical energy. Each cell contains reactants that undergo a chemical reaction to produce electrical energy, and when cells are linked, their voltages add to provide the needed output. This is why a battery is defined by multiple cells rather than a single cell. A single cell does the energy conversion as well, but the term battery specifically refers to several cells working together. A device that measures current or a switch does not store chemical energy or convert it to electricity, so those options aren’t batteries.