Editing Energy storage (section)

=== Outline ===
The following list includes a variety of types of energy storage:

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* Fossil fuel storage
* Mechanical
** [[Spring (device)|Spring]]
** [[Compressed-air energy storage]] (CAES)
** [[Fireless locomotive]]
** [[Flywheel energy storage]]
** [[#Solid_mass_gravitational|Solid mass gravitational]]
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** [[Hydraulic accumulator]]
** [[Pumped-storage hydroelectricity]] (a.k.a. pumped hydroelectric storage, PHS, or pumped storage hydropower, PSH)
** [[Thermal expansion]]
* Electrical, electromagnetic
** [[Capacitor]]
** [[Supercapacitor]]
** [[Superconducting magnetic energy storage]] (SMES, also superconducting storage coil)
* Biological
** [[Glycogen]]
** [[Starch]]
* Electrochemical (battery energy storage system, BESS)
** [[Flow battery]]
** [[Rechargeable battery]]
** [[UltraBattery]]
* Thermal
** [[Storage heater|Brick storage heater]]
** [[Cryogenic energy storage]], liquid-air energy storage (LAES)
** [[Liquid nitrogen engine]]
** [[Eutectic system]]
** [[Ice storage air conditioning]]
** [[Molten salt heat storage|Molten salt storage]]
** [[Phase-change material]]
** [[Seasonal thermal energy storage]]
** [[Solar pond]]
** [[Steam accumulator]]
** [[Thermal energy storage]] (general)
* Chemical
** [[Biofuel]]s
** [[Hydrate|Hydrated salts]]
** [[Hydrogen peroxide]]
** [[Power-to-gas]] ([[methane]], [[hydrogen storage]], [[oxyhydrogen]])
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