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An electrical cell is an "electrical power supply" - internally it converts stored chemical energy into electrical potential energy, allowing a current to flow from the positive terminal round to the negative one via an external circuit (this is called conventional current, which is chosen to go from + to -).

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Cell is a device used to produce electric current
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Cell is a device used to power electrical circuits. It has two terminals; positive and negative. The terminal marked negative is the source of electrons, that when connected to a circuit delivers energy. We can take the example of a normal torch battery. A battery is a combination of multiple cells

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The purpose of the battery in a series circuit is to give the circuit a source of energy. ... The purpose of the wires in a series circuit is to allow the electricity to flow from one device to the next. Wire is used to carry the flow of electrons.
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A cell has two ends, labelled + (positive) and – (negative). A cell pushes
theelectric current from the positive terminal round to the negative one. ... Two or morecells can be connected end-to-end to make a battery. A typical cell has a voltage of 1.5 volts (we write this as 1.5 V).

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