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  2. MagSafe (wireless charger) - Wikipedia

    en.wikipedia.org/wiki/MagSafe_(wireless_charger)

    It contains a 11.13 W⋅h, 1,460 mA⋅h battery that on its own can charge an iPhone at up to 7.5 W. [27] While the pack is being charged via Lightning it can charge an iPhone at up to 15 W. The pack itself can be charged either directly through its Lightning port or wirelessly from an iPhone that is being charged via Lightning.

  3. Qi (standard) - Wikipedia

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

    Qi (/ tʃ iː / CHEE) is an open standard for inductive charging developed by the Wireless Power Consortium.It allows compatible devices, such as smartphones, to receive power when placed on a Qi charger, which can be effective over distances up to 4 cm (1.6 in). [1]

  4. MagicBand - Wikipedia

    en.wikipedia.org/wiki/MagicBand

    The bands were announced on January 7, 2013, by Tom Staggs as a part of MyMagic+. [ 2 ] There are three models of MagicBands: the original and now-discontinued MagicBand; MagicBand 2, which features interchangeable "Icons" (the actual RFID portion of the bracelet) that can be used on different bands and accessories; and MagicBand+, an enhanced ...

  5. Superconducting magnetic energy storage - Wikipedia

    en.wikipedia.org/wiki/Superconducting_magnetic...

    EMF is defined as electromagnetic work done on a unit charge when it has traveled one round of a conductive loop. The energy could now be seen as stored in the electric field. This process uses energy from the wire with power equal to the electric potential times the total charge divided by time. Where ℰ is the voltage or EMF.

  6. Tamper-evident band - Wikipedia

    en.wikipedia.org/wiki/Tamper-evident_band

    When an aluminum or plastic bottle cap has an integral band, it is usually connected by thin bridges. They can be molded along with the cap or slit afterwards. [1] When unscrewing the cap, the frangible ring breaks: the ring can separate from the cap, and two separate pieces remain, the sealing piece and the leftover ring; or the broken ring can form a "pigtail" still attached to the cap.

  7. Tip and ring - Wikipedia

    en.wikipedia.org/wiki/Tip_and_ring

    The nominal battery (system) voltage is 52.1 V, based on a 24-cell lead-acid battery. [1] The voltage at a subscriber's network interface is typically 48 V between the ring and tip wires, with tip near ground (slightly negative relative to ground) and ring at −48 V relative to tip.

  8. Marching percussion - Wikipedia

    en.wikipedia.org/wiki/Marching_percussion

    The battery marches on the field in a group as opposed to the stationary front ensemble. The battery usually consists of snare drums, bass drums, tenor drums, and cymbals. [3] In the past, marching timpani were common, as were marching keyboard percussion instruments such as glockenspiels and xylophones. However, due to the addition of the ...

  9. Smartphone - Wikipedia

    en.wikipedia.org/wiki/Smartphone

    An adapter reserving the charging port can retrofit the plug. Battery-powered, wireless Bluetooth headphones are an alternative. Those tend to be costlier however due to their need for internal hardware such as a Bluetooth transceiver and a battery with a charging controller, and a Bluetooth coupling is required ahead of each operation. [249]

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