battery converts chemical energy into electrical energy. There are two types of batteries: primary and secondary batteries.

A flywheel is a device which is used to store rotational energy (kinetic energy). This device was commonly used in combination with a motor

The common way of working in this type of energy storage system is to store air during off–peak hours through the use of compressors.

These types of storage system collect the water from creeks and/or rivers and store it in an upper reservoir (commonly under off–peak demand

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