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  2. Amazon Kindle - Wikipedia

    en.wikipedia.org/wiki/Amazon_Kindle

    Amazon announced the second-iteration Kindle Paperwhite, marketed as the "All-New Kindle Paperwhite" and colloquially referred to as the Paperwhite 2, on September 3, 2013; [58] the Wi-Fi version was released on September 30 ($120 ad-supported, $140 no ads), and the 3G/Wi-Fi version was released in the US on November 5, 2013 ($190 ad-supported ...

  3. Qi (standard) - Wikipedia

    en.wikipedia.org/wiki/Qi_(standard)

    wirelesspowerconsortium .com. Qi (pronounced / tʃiː / CHEE; [ 1] from simplified Chinese: 气; traditional Chinese: 氣; pinyin: qì) is an interface standard for wireless power transfer using inductive charging. The standard allows compatible devices, such as smartphones, to charge their batteries when placed on a Qi charging pad, which can ...

  4. E-reader - Wikipedia

    en.wikipedia.org/wiki/E-reader

    E-reader. An e-reader, also called an e-book reader or e-book device, is a mobile electronic device that is designed primarily for the purpose of reading digital e-books and periodicals. [ 1][ 2] Any device that can display text on a screen may act as an e-reader; however, specialized e-reader devices may optimize portability, readability, and ...

  5. Conductive charging - Wikipedia

    en.wikipedia.org/wiki/Conductive_charging

    The technology is sometimes called "conductive wireless charging". The need for a conductor-to-conductor connection between the power supply and the device is the main difference from inductive charging and other forms of wireless charging. The conductive power supply, often a charging base or pad, detects when a compatible receiver or pickup ...

  6. Inductive charging - Wikipedia

    en.wikipedia.org/wiki/Inductive_charging

    Inductive charging. The primary coil in the charger induces a current in the secondary coil in the device being charged. Inductive charging (also known as wireless charging or cordless charging) is a type of wireless power transfer. It uses electromagnetic induction to provide electricity to portable devices. Inductive charging is also used in ...

  7. Wireless Power Consortium - Wikipedia

    en.wikipedia.org/wiki/Wireless_Power_Consortium

    The Wireless Power Consortium ( WPC) is a multinational technology consortium formed on December 17, 2008, and based in Piscataway, New Jersey. Its mission is to create and promote wide market adoption of its interface standards Qi, Ki Cordless Kitchen, and Qi Medium Power for inductive charging. [2] [3] It is an open membership of Asian ...

  8. Wireless power transfer - Wikipedia

    en.wikipedia.org/wiki/Wireless_power_transfer

    Wireless power transfer. Inductive charging pad for a smartphone as an example of near-field wireless transfer. When the phone is set on the pad, a coil in the pad creates a magnetic field [ 1] which induces a current in another coil, in the phone, charging its battery. Wireless power transfer ( WPT ), wireless power transmission, wireless ...

  9. Resonant inductive coupling - Wikipedia

    en.wikipedia.org/wiki/Resonant_inductive_coupling

    Resonant inductive coupling or magnetic phase synchronous coupling[ 4][ 5] is a phenomenon with inductive coupling in which the coupling becomes stronger when the "secondary" (load-bearing) side of the loosely coupled coil resonates. [ 5] A resonant transformer of this type is often used in analog circuitry as a bandpass filter.