Biogas is produced as a result of the biological breakdown or decomposition of organic matter in the absence of oxygen. This process is called 'anaerobic digestion' and uses biodegradable materials, such as municipal waste, green waste, crops, plant materials, sludge from sewage, manure, and biomass, to produce biogas. Biogas is an alternative source of renewable energy.

An e-bike, also known as a booster bicycle, consists of an integrated electric motor for propulsion. Based on the power that the electric motor can deliver and control the system, e-bikes can be classified as e-bikes with pedal assist only, those with power-on-demand and pedal assist, and those with power-on-demand only. An e￾bike battery is used to power e-bikes and is basically a rechargeable battery, which can be recharged at any charging station or at home.

Batteries are one of the most important components of electric vehicles (EVs). EVs require batteries for both propulsion and starting lighting, and ignition (SLI). Batteries play a major role in the adoption of EVs due to their importance in determining the driving range, the cost of ownership, and the performance of the EVs.

An Electric Vehicle (EV) charging station is a facility or piece of equipment that provides electrical power to recharge the batteries of EVs. These stations are basically of two types, AC charging stations and DC charging stations.

Electricity trading enhances grid stability, encourages competition, reduces prices, and makes renewable energy integration easier in global energy markets. Electricity trading refers to the buying and selling of electricity among participants in the electricity industry, such as independent power producers, open-access consumers, and municipality-owned utilities. Various forms of electricity trading are possible depending on market design, ranging from short-term trading to long-term trading. Electricity can be traded on exchanges, over the counter (OTC) with an intermediary, and directly OTC with no intermediary.

A fired heater is used for heat generation by combustion of oil or gas or a mixture of them. The fluid that is flowing in the heater is heated without changing state or with vaporization already started at the fuel inlet. Fired heaters are used for steam generation and petroleum refining in refineries; gas plants; chemical and petrochemical industries; and olefins, ammonia, and fertilizer plants.

The 21700 lithium-ion batteries are a type of cylindrical lithium-ion battery, which have a diameter of 21 mm and length of 70 mm. The battery type is named based on its specification. These batteries are available in either button-top or flat-top terminals and are used in applications that have high-capacity requirements, such as EVs, ESS, and cordless power tools.

Battery units are fitted into telecom towers to deliver power supply during power outages. These units are either used as standalone batteries or are clubbed with diesel generators to switch between power sources whenever needed.

A cordless jobsite light is a portable lighting device designed for use in environments with limited access to electricity. Powered by non-rechargeable and rechargeable batteries, these lights can be easily transported and positioned as needed, offering users flexibility and convenience. The market for cordless jobsite lights has been growing rapidly in recent years. This growth is driven by the rising demand for portable lighting solutions in industries such as construction, oil & gas, and emergency services. The ability of cordless work lights to deliver immediate illumination without relying on external power sources is a significant factor behind their increasing popularity.

Circadian lighting refers to a lighting system designed to mimic the natural patterns of sunlight throughout the day, which helps regulate the circadian rhythm of the body, which is the internal biological clock that controls the sleep-wake cycle and other physiological processes