A rechargeable battery, storage battery, or secondary cell (formally a type of energy accumulator), is a type of electrical battery which can be charged, discharged into a load, and recharged many times, as opposed to a disposable or primary battery, which is supplied fully charged and discarded after use. It is composed. Devices which use rechargeable batteries include, portable consumer devices, light vehicles (such as,,, and electric ), road vehicles (cars, vans,. The active components in a secondary cell are the chemicals that make up the positive and negative active materials, and the. The positive and negative are made up of different materials, with the positive exhibiting a potential. A rechargeable battery is only one of several types of rechargeable energy storage systems. Several alternatives to rechargeable batteries exist or are under development. For uses such as, rechargeable batteries may be replaced by clockwork. • • • • • During charging, the positive active material is, releasing, and the negative material is, absorbing electrons. These electrons constitute the flow in the external. The may serve as a simple buffer for internal Commercial typesThe, invented in 1859 by French physicist, is the oldest type of rechargeable battery. Despite having a very low energy-to-weight ratio and a low energy-to-volume ratio, its ability to supply. Rechargeable battery research includes development of new electrochemical systems as well as improving the life span and capacity of current types.