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  2. HP-19C/-29C - Wikipedia

    en.wikipedia.org/wiki/HP-19C/-29C

    HP-19C calculator HP-29C with AC-powered battery charger. The HP-19C and HP-29C were scientific/engineering pocket calculators made by Hewlett-Packard between 1977 and 1979. They were the most advanced and last models of the "20" family (compare HP-25) and included Continuous Memory (battery-backed CMOS memory) as a standard feature.

  3. Range extender - Wikipedia

    en.wikipedia.org/wiki/Range_extender

    The Li Auto One is a large SUV which combines a 41-kWh battery with a small 1.2-litre gasoline engine. [36] [37] This approach has also been used for heavy vehicles, such as Wrightbus's Gemini 2 [38] and New Routemaster [39] buses. Hydrogen fuel cells have also been used as a range extender for battery electric buses, allowing them to have ...

  4. Turboexpander - Wikipedia

    en.wikipedia.org/wiki/Turboexpander

    The system in the figure implements a Rankine cycle as it is used in fossil-fuel power plants, where water is the working fluid and the heat source is derived from the combustion of natural gas, fuel oil or coal used to generate high-pressure steam. The high-pressure steam then undergoes an isentropic expansion in a conventional steam turbine ...

  5. Hydrogen turboexpander-generator - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_turboexpander...

    Per stage, 200 bar is handled with up to 15,000 kW power and a maximum expansion ratio of 14, the generator loaded expander for hydrogen gas is fitted with an automatic thrust balance, a dry gas seal, and a programmable logic control with remote monitoring and diagnostics. [1]

  6. Compressed-air energy storage - Wikipedia

    en.wikipedia.org/wiki/Compressed-air_energy_storage

    A pressurized air tank used to start a diesel generator set in Paris Metro. Compressed-air-energy storage (CAES) is a way to store energy for later use using compressed air. At a utility scale, energy generated during periods of low demand can be released during peak load periods. [1]

  7. Battery charger - Wikipedia

    en.wikipedia.org/wiki/Battery_charger

    A battery charger, recharger, or simply charger, [1] [2] is a device that stores energy in an electric battery by running current through it. The charging protocol—how much voltage and current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged.