Only police cars on

the island are  powered by electricity.

The half  of the electric cars on the island will need

to store power as well as using it.

The battery in not

enough  capable to power  people's homes.

A reversible

battery

is powered by the sun.

The local government

is looking for a way of storing energy for use at nighttime.

The connecting rod

links

the

The valves open and close the fuel tank where the burning of fuel takes place.

Exhaust valve

s allow the

gases to pass from the

A crankshaft opens each