Cells

• cells use chemical reactions to produce electricity

Factors that affect voltage cell

• The metals used for the two electrodes (the greater the difference in reactivity of the two metals, the greater the voltage will be).

• The type/concentration of the electrolyte used.

• The conditions (e.g., temperature)

Cells and batteries - rechargeable/non-rechargeable

• Rechargeable cells/batteries - are rechargeable because chemical reactions can be reversed when an external electrical current is applied (charger).

  Examples - mobile, laptop.

• Non-rechargeable cells/batteries - are not rechargeable because chemical reactions producing electricity stop when a reactant is used up.

  Examples - smoke alarms, TV remotes, alkaline batteries.

Batteries

• Batteries use chemical reactions to produce electricity, but consist of two or more cells connected together in series to provide a greater voltage.

  

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