Electricity has the following :
- It is clean;
- It is to use;
- It is reliable.

It has the follwoing disadvantages:
- It can be if misused;
- It can be expensive to supply [?] communities.

Batteries store their energy as energy. They supply electrical energy by allowing a chemical to work when the circuit is connected. They allow devices to work away from a [?] supply. However they don't store very much energy. Some batteries have to be thrown away after use. Other batteries are .

Distant communities can pick up radio with a radio. The spring drives a small [?] to charge a battery to run the radio.

[?] can also be used to supply electricity.