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  2. Battery holder - Wikipedia

    en.wikipedia.org/wiki/Battery_holder

    Battery types such as the 9-volt have snap-on contacts. Battery holders for zinc-air batteries must not be completely air-tight since approximately 1 litre of air is required per ampere-hour of discharge per cell. The battery holder may include a valve integrated with the device power switch to allow air to be admitted when the device is ...

  3. Battery energy storage system - Wikipedia

    en.wikipedia.org/wiki/Battery_energy_storage_system

    The 2021 price of a 60 MW / 240 MWh (4-hour) battery installation in the United States was US$379/usable kWh, or US$292/nameplate kWh, a 13% drop from 2020. [87] [88] In 2010, the United States had 59 MW of battery storage capacity from 7 battery power plants. This increased to 49 plants comprising 351 MW of capacity in 2015.

  4. Biosafety cabinet - Wikipedia

    en.wikipedia.org/wiki/Biosafety_cabinet

    Red is single pass air and is safe for chemical use. Purple is uncertainty due to location of the BSCs smoke-split) The Type A1 cabinet, formerly known as Type A, has a minimum inflow velocity of 75 ft/min. The downflow air, considered contaminated, splits just above the work surface (the BSCs smoke split) and mixes with the inflow.

  5. Glass battery - Wikipedia

    en.wikipedia.org/wiki/Glass_battery

    The battery's design is safer than lithium-ion batteries, as the use of a flammable liquid electrolyte is avoided. [2] The battery can also be made using low-cost sodium instead of lithium. [2] The authors claim the battery has a much shorter charging time than Li-ion batteries—in minutes rather than hours.

  6. Boron nitride nanotube - Wikipedia

    en.wikipedia.org/wiki/Boron_nitride_nanotube

    Pure h-BN powder is continuously transformed into BNNTs by passing through a high-temperature N 2-H 2 plasma (~8000 K). (b) Calculated temperature distribution inside the reactor. (c) Calculated velocity distribution (left) and streamlines (right). [13] Meters-long BN buckypaper sheets can be fabricated by adding a cylindrical drum to the above ...

  7. BNC connector - Wikipedia

    en.wikipedia.org/wiki/BNC_connector

    In 1941, the US Navy used a smaller version of the threaded N connector, the Type BN (Baby N), as the UG-85/U, UG-86/U, UG-114/U and UG-115/U. . In 1943, the British introduced a ¼ inch 50 ohm coaxial cable, and companies immediately developed many connectors for it.

  8. First Battery Armory - Wikipedia

    en.wikipedia.org/wiki/First_Battery_Armory

    The First Battery Armory (also known as the 102nd Medical Armory and the State Armory) is a historic National Guard armory building at 56 West 66th Street, between Central Park West and Columbus Avenue, on the Upper West Side of Manhattan in New York City, United States.

  9. Coupon-eligible converter box - Wikipedia

    en.wikipedia.org/wiki/Coupon-eligible_converter_box

    A coupon-eligible converter box (CECB) was a digital television adapter that met eligibility specifications for subsidy "coupons" from the United States government.The subsidy program was enacted to provide terrestrial television viewers with an affordable way to continue receiving free digital terrestrial television services after the nation's television service transitioned to digital ...