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The Power Source: Cells And Batteries

Understand the anatomy of an electric cell and how cells combine to form a battery.

7 lessons
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Cell vs Battery

Clarification on common terminology.

The AA 'batteries' in your remote are actually called electric cells! We use the term battery everyday, but scientifically, a battery is a combination of two or more cells.
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Anatomy of an Electric Cell

Explanation of positive and negative terminals.

An electric cell is a compact, portable source of electrical energy. It powers small devices like your torch, wall clock, or TV remote.

The Positive Terminal (+ve)

Look closely at a standard cell. You'll notice a small protruding metal cap on one end. This is the positive terminal of the cell.

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The Electric Cell

Visual diagram of an electric cell with labels.

Clean scientific diagram of a standard cylindrical electric cell lying horizontally, pastel color palette, white background, soft shadows. Precise labeling indicating the small protruding metal cap on the right as 'Positive terminal (+)' and the flat metal disc on the left as 'Negative terminal (-)', elegant typography.
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A single electric cell showing its positive and negative terminals.

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Identify the Terminals

Fill in the blank exercise on cell terminals.

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An electric cell is a portable source of electrical. All electric cells have two. The metal cap of an electric cell is theterminal. In contrast, the flat metal disc serves as theterminal. For many devices, we often need to connect multiple cells to form a. In this arrangement, the positive terminal of one cell must be connected to the negative terminal of thecell.
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Building a Battery

How to connect cells to form a battery.

For many devices, a single cell doesn't provide enough energy. When we connect two or more cells together, we create a battery. Connecting multiple cells provides energy for a longer time or gives more power to the device.

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Battery Alignment

Diagram showing correct end-to-end cell alignment.

Clean scientific diagram showing two separate battery alignments, pastel color palette, white background. Top diagram (a): A battery made of two cylindrical cells connected end-to-end, with the positive cap of the left cell touching the negative flat disc of the right cell. Bottom diagram (b): A battery made of four cells connected in the same positive-to-negative continuous sequence. Elegant typography, soft shadows.
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Cells must be connected positive-to-negative to function as a battery.

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Check Your Connection

MCQ testing the rule for combining cells.

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You're replacing the cells in your flashlight. How must the two cells be arranged so the torch works properly?