Difference Between Primary Cell and Secondary Cell

Difference Between Primary Cell and Secondary Cell

Primary Cell and Secondary Cell

Battery or cells are referred to as the parallel combination of electrochemical cells. The major difference between a primary cell and the secondary cell is that primary cells are the ones that cannot be charged but secondary cells are the ones that are rechargeable.

Primary cell

Primary cells have high density and get discharged slowly. Since there is no fluid inside these cells they are also known as dry cells. The internal resistance is high and the chemical reaction is irreversible. Its initial cost is cheap and also primary cells are easy to use.

Secondary cell

Secondary cells have low energy density and are made of molten salts and wet cells. The internal resistance is low and the chemical reaction is reversible. Its initial cost is high and is a little complicated to use when compared to the primary cell.

Difference Between Primary Cell and Secondary Cell

Primary cells are the ones which cannot be recharged and has to be discarded after the expiration of the lifetime whereas, secondary cells need to be recharged when the charge gets over. Both the types of battery are used extensively in various appliances and these cells differ in size and material used in them.

Difference Between Primary Cell and Secondary Cell

Primary Cell

Secondary Cell
Have high energy density and slow in discharge and easy to use

They are smaller energy density

There are no fluids in the cells hence it is also called as dry cells

There are made up of wet cells (flooded and liquid cells) and molten salt (liquid cells with different composition)

It has high internal resistance

It has low internal resistance

It has an irreversible chemical reaction

It has a reversible chemical reaction

Its design is smaller and lighter

Its design is more complex and heavier

Its initial cost is cheap

Its initial cost is high

These were some difference between Primary cell and Secondary cell. If you wish to find out more, download BYJU’S The Learning App.

Frequently asked questions

Give some examples of the secondary cell.

Lithium-ion battery and nickel-cadmium.

Give some examples of the primary cell.

Alkaline batteries and dry cells are examples of primary cells.

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