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Battery


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Everyone

A Cell

Cell.gif

A battery contains two or more cells

Depending on the cell chemistry some types can be recharged many times. Others can be used once only.

A cell can be made from any two different metals and an ionic liquid solution. Hence the clock powered by a lemon or potato.

Comparing Batteries

Lead Acid

Lithium Ion

Nickel Cadmium

  • Heavy.
  • Relatively Cheap.
  • Can supply high currents.
  • Lead is toxic.
  • Best affordable energy to weight ratio.
  • Lighter than lead acid.
  • More expensive than lead acid.
  • Chemicals are less harmful.
  • Can supply high currents.
  • No longer in common use.
  • Cadmium is very toxic.

 

 

 

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