Batteries use chemistry, in the form of chemical potential, to store energy, just like many other everyday energy sources. For example, logs and oxygen both store energy in their chemical bonds until burning converts some of that chemical energy to heat. . Batteries and similar devices accept, store, and release electricity on demand. To understand the magic inside a battery, we must journey into the realms of thermodynamics, electrochemistry, and electromotive force. We'll break open the. . Innovations in energy storage are critical to the transition from fossil fuels to alternative sustainable energy sources. This process relies on internal chemical reactions. When charging, energy is stored; when used, it is released. Lithium battery packs, a popular solution, dominate industrial and commercial. . Batteries store energy chemically, converting it into electrical power when needed.