Electrical energy storage was developed by Alessandro Volta in the late 1700s, and chemistry has contributed to subsequent improvements in battery power.
The 1890 carbon-zinc dry cell improved upon the earlier Leclanché 'wet-cell' design. It was commercially produced for use in flashlights and it is still used today.
In 1949, a new alkaline paste for the traditional battery enhanced lifetime and allowed miniaturization, and this alkaline battery quickly found many uses in portable electronic devices and cameras. Since then, newer battery developments have used silver oxide, mercuric oxide, or lithium.