In energy economics and ecological energetics, energy return on investment (EROI), also sometimes called energy returned on energy invested (ERoEI), is the ratio of the amount of usable energy (the exergy) delivered from a particular energy resource to the amount of exergy used to obtain that energy…

Energy storage is the capture of energy produced at one time for use at a later time to reduce imbalances between energy demand and energy production. A device that stores energy is generally called an accumulator or battery.

Geothermal energy is thermal energy extracted from the Earth's crust. It combines energy from the planet's formation and from radioactive decay.

Lenovo smartphones are marketed as the "LePhone" in mainland China, and as the "IdeaPhone" overseas (designed and manufactured by the Motorola Mobility, ZUK Mobile and Medion, divisions of Lenovo). On April 27, 2017, Lenovo announced that the ZUK brand would cease operations.

Energy in Bangladesh describes energy and electricity production, consumption and import in Bangladesh. Bangladesh is an emerging economy with a fast-growing energy consumption.

The energy policy of the United Kingdom refers to the United Kingdom's efforts towards reducing energy intensity, reducing energy poverty, and maintaining energy supply reliability. The United Kingdom has had success in this, though energy intensity remains high.

Open energy-system models are energy-system models that are open source. These models can also be known as open energy models or open-source energy-system models or some combination thereof.

Outfox Energy, the trading name of Foxglove Energy Supply Limited, is a British energy supplier based in Leicester, United Kingdom. It was founded in 2017.

Most energy in Israel comes from fossil fuels. The country's total primary energy demand is significantly higher than its total primary energy production, relying heavily on imports to meet its energy needs.

Diazepam, sold under the brand name Valium among others, is a medication of the benzodiazepine family that acts as an anxiolytic. It is used to treat a range of conditions, including anxiety, seizures, alcohol withdrawal syndrome, muscle spasms, insomnia, and restless legs syndrome.