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A23 Battery
Left to right: AA, AAA, AAAA, N and A23 batteries An open A23 battery showing the LR932 cells with an intact battery The A23 battery (also referred to as 23AE, GP23A, V23GA, LRV08, 8LR932, 8LR23, MN21, L1028 or ANSI-1181A) is a dry battery consisting of eight LR932 cells, with a nominal voltage of 12 V. It is mainly used in small electronic keychain radio devices, such as keyless vehicle entry systems, home security systems, garage door openers, and Bluetooth headsets. Design An A23 battery is cylindrical and approximately two-thirds the length of an AAA battery, measuring 28.2 mm long and 10.0 mm in diameter, with a typical weight of 8 grams. An A23 battery is an 8-cell device with a nominal voltage of 12 V. The higher voltage is necessary for the radio frequency-transmitting and receiving devices which A23 batteries often power. It has a capacity of around 55 mAh. A23 batteries are constructed of eight individual LR932 alkaline button cells enclosed in a wra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A-A23-N-batteries
AA, Aa, Double A, or Double-A may refer to: Arts, entertainment and media * ''America's Army'', a 2002 computer game published by the U.S. Army * ''Ancient Anguish'', a computer game in existence since 1992 * Aa!, a J-Pop musical group * Double-A (band), stylised as AA, South Korean boy band * ''Aa'' (album), a 2016 album by Baauer * AA (song), a 2021 single by Walker Hayes * Ace Attorney, a series of video games developed by Capcom. *AA Films, an Indian film distribution company *AA Book (other) *AA, the production code for the 1966 ''Doctor Who'' serial '' The Savages'' Brands, organizations and enterprises * Alcoholics Anonymous, an international fellowship dedicated to helping alcoholics peer to peer in sobriety * A. A. Arms, a defunct firearms manufacturer * Aerolíneas Argentinas, an Argentine airline (logo used to consist of two A's) * Air Asia, an Asian multinational low cost carrier * Alcoa, an American aluminum-producing company (stock symbol AA) * America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diameter
In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. It can also be defined as the longest chord of the circle. Both definitions are also valid for the diameter of a sphere. In more modern usage, the length d of a diameter is also called the diameter. In this sense one speaks of diameter rather than diameter (which refers to the line segment itself), because all diameters of a circle or sphere have the same length, this being twice the radius r. :d = 2r \qquad\text\qquad r = \frac. For a convex shape in the plane, the diameter is defined to be the largest distance that can be formed between two opposite parallel lines tangent to its boundary, and the is often defined to be the smallest such distance. Both quantities can be calculated efficiently using rotating calipers. For a curve of constant width such as the Reuleaux triangle, the width and diameter are the same because all ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A27 Battery
The A27 battery (also known as GP27A, MN27, L828, 27A, V27A, A27BP, G27A) is a dry cell-type battery used in some small remote controls and some cigarette lighters. An A27 battery is cylindrical, 27.8 mm long and 7.7 mm in diameter, with a typical weight of 4.4 grams, and a typical capacity around 20 mAh. It has nominal voltage of 12 V. It is thus similar to the A23 battery, with almost the same length and the same nominal voltage, but thinner, made of eight LR732 button cells. See also * List of battery sizes * Battery (electricity) An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices. When a battery is supplying power, its positive terminal is the cathode and its negat ... References Battery shapes {{Electronics-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
N Battery
An N battery (or N cell) is a standard size of dry-cell battery. An N battery is cylindrical with electrical contacts on each end; the positive end has a bump on the top. The battery has a length of 30.2 mm and a diameter of 12.0 mm, and is approximately three-fifths the length of a AA battery. Overview A zinc–carbon battery in this type is designated as ''R1'' by IEC standards; likewise, an alkaline battery in this type is designated as ''LR1''. ANSI designates this battery as ''910A'' and ''910D'' for alkaline and zinc–carbon chemistries, respectively. Energizer calls this type ''E90''. Mercury batteries of the same dimensions are no longer manufactured because of their toxicity. Former mercury cells such as the Mallory RM401, Duracell RM-401, IEC-MR1, etc. were supplanted by the alkaline Kodak KN. Rechargeable N-size batteries are also available, in nickel-cadmium (''KR1'') and nickel-metal hydride (''HR1'') chemistries. However, these are far less comm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Button Cell
A button cell, watch battery, or coin battery is a small single-cell battery shaped as a squat cylinder typically in diameter and high — resembling a button. Stainless steel usually forms the bottom body and positive terminal of the cell; insulated from it, the metallic top cap forms the negative terminal. Button cells are used to power small portable electronics devices such as wrist watches and pocket calculators. Wider variants are usually called coin cells. Devices using button cells are usually designed around a cell giving a long service life, typically well over a year in continuous use in a wristwatch. Most button cells have low self-discharge, holding their charge for a long time if not used. Relatively high-power devices such as hearing aids may use a zinc–air battery, which has a much higher capacity for a given size, but dries out after a few weeks even if not used. Button cells are single cells, usually disposable primary cells. Common anode materials are zinc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Receiver (radio)
In radio communications, a radio receiver, also known as a receiver, a wireless, or simply a radio, is an electronic device that receives radio waves and converts the information carried by them to a usable form. It is used with an antenna. The antenna intercepts radio waves (electromagnetic waves of radio frequency) and converts them to tiny alternating currents which are applied to the receiver, and the receiver extracts the desired information. The receiver uses electronic filters to separate the desired radio frequency signal from all the other signals picked up by the antenna, an electronic amplifier to increase the power of the signal for further processing, and finally recovers the desired information through demodulation. Radio receivers are essential components of all systems that use radio. The information produced by the receiver may be in the form of sound, video (television), or digital data. A radio receiver may be a separate piece of electronic equipment, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transmitter
In electronics and telecommunications, a radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna (radio), antenna. The transmitter itself generates a radio frequency alternating current, which is applied to the Antenna (radio), antenna. When excited by this alternating current, the antenna radiates radio waves. Transmitters are necessary component parts of all electronic devices that communicate by radio communication, radio, such as radio broadcasting, radio and television broadcasting stations, cell phones, walkie-talkies, Wireless LAN, wireless computer networks, Bluetooth enabled devices, garage door openers, two-way radios in aircraft, ships, spacecraft, radar sets and navigational beacons. The term ''transmitter'' is usually limited to equipment that generates radio waves for Communication engineering, communication purposes; or radiolocation, such as radar and navigational transmitters. Generators of radio waves for heatin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Frequency
Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around to around . This is roughly between the upper limit of audio frequencies and the lower limit of infrared frequencies; these are the frequencies at which energy from an oscillating current can radiate off a conductor into space as radio waves. Different sources specify different upper and lower bounds for the frequency range. Electric current Electric currents that oscillate at radio frequencies (RF currents) have special properties not shared by direct current or lower audio frequency alternating current, such as the 50 or 60 Hz current used in electrical power distribution. * Energy from RF currents in conductors can radiate into space as electromagnetic waves ( radio waves). This is the basis of radio technology. * RF current does not penetrate deeply into electrical c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gram
The gram (originally gramme; SI unit symbol g) is a Physical unit, unit of mass in the International System of Units (SI) equal to one one thousandth of a kilogram. Originally defined as of 1795 as "the absolute weight of a volume of pure water equal to Cube (algebra), the cube of the hundredth part of a metre [1 Cubic centimetre, cm3], and at Melting point of water, the temperature of Melting point, melting ice", the defining temperature (~0 °C) was later changed to 4 °C, the temperature of maximum density of water. However, by the late 19th century, there was an effort to make the Base unit (measurement), base unit the kilogram and the gram a derived unit. In 1960, the new International System of Units defined a ''gram'' as one one-thousandth of a kilogram (i.e., one gram is Scientific notation, 1×10−3 kg). The kilogram, 2019 redefinition of the SI base units, as of 2019, is defined by the International Bureau of Weights and Measures from the fixed numeric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AAA Battery
The AAA battery (or triple-A battery) is a standard size of dry cell Battery (electricity), battery. One or more AAA batteries are commonly used in low-drain portable electronic devices. A zinc–carbon battery in this size is designated by International Electrotechnical Commission, IEC as R03, by ANSI C18.1 as 24, by old Japanese Industrial Standards, JIS standard as UM-4, and by other manufacturer and national standard designations that vary depending on the cell chemistry. The size was first introduced by Eveready Battery Company, The American Ever Ready Company in 1911. An AAA battery is a single cell that measures in diameter and in length, including the positive terminal button, which is a minimum . The positive terminal has a maximum diameter of ; the flat negative terminal has a minimum diameter of . Alkaline battery, Alkaline AAA batteries weigh around , while primary lithium battery, lithium AAA batteries weigh about . Rechargeable Nickel–metal hydride battery, n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A23-open-closed
A, or a, is the first letter and the first vowel of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''a'' (pronounced ), plural ''aes''. It is similar in shape to the Ancient Greek letter alpha, from which it derives. The uppercase version consists of the two slanting sides of a triangle, crossed in the middle by a horizontal bar. The lowercase version can be written in two forms: the double-storey a and single-storey ɑ. The latter is commonly used in handwriting and fonts based on it, especially fonts intended to be read by children, and is also found in italic type. In English grammar, " a", and its variant " an", are indefinite articles. History The earliest certain ancestor of "A" is aleph (also written 'aleph), the first letter of the Phoenician alphabet, which consisted entirely of consonants (for that reason, it is also called an abjad to distinguish it fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Headset (audio)
Headsets connect over a telephone or to a computer, allowing the user to speak and listen while keeping both hands free. They are commonly used in customer service and technical support centers, where employees can converse with customers while typing information into a computer. Also common among computer gamers are headsets, which will let them talk with each other and hear others, as well as use their keyboards and mice to play the game. Types Telephone headsets generally use loudspeakers with a narrower frequency range than those also used for entertainment. Stereo computer headsets, on the other hand, use 32-ohm speakers with a broader frequency range. Mono and stereo Headsets are available in single-earpiece and double-earpiece designs. Double-earpiece headsets may support stereo sound or use the same monaural audio channel for both ears. Single-earpiece headsets free up one ear, allowing better awareness of surroundings. Telephone headsets are monaural, even for doubl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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