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2. Lightning (connector) - Wikipedia

   en.wikipedia.org/wiki/Lightning_(connector)

   A known failure mode of Lightning plugs is power contacts turning black over time, sometimes causing the affected side of the connector to cease functioning. When the plug is inserted or unplugged while powered, a brief spark may occur between the mating power contacts in the plug and socket, eroding their gold plating. Because the Lightning ...

3. MagSafe (wireless charger) - Wikipedia

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

   The MagSafe Duo Charger is a foldable charging mat with a MagSafe charger on one side and an Apple Watch charger on the other. The Apple Watch charger disc can be laid flat for face-up charging or can be vertical for nightstand use. The MagSafe Duo charger can be folded when not in use.

4. MagSafe - Wikipedia

   en.wikipedia.org/wiki/MagSafe

   The computer makes use of this to retrieve information about the power adapter and to change the color of the LEDs on the power adapter's connector. The Apple MagSafe power adapter's 1-Wire communication chip is located inside the MagSafe connector itself; the cable does not carry the data line to the power adapter enclosure. [18]

5. Dock connector - Wikipedia

   en.wikipedia.org/wiki/Dock_Connector

   Dock connector on a 2011's HP EliteBook laptop. A dock connector is an electrical connector used to attach a mobile device simultaneously to multiple external resources. Dock connectors typically carry a variety of signals and power, through a single connector, to simplify the process of docking the device.

6. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   Some devices operate in different modes depending on whether the data connection is made. Charging docks supply power and do not include a host device or data pins, allowing any capable USB device to charge or operate from a standard USB cable. Charging cables provide power connections, but not data. In a charge-only cable, the data wires are ...

7. USB-C - Wikipedia

   en.wikipedia.org/wiki/USB-C

   When connecting two devices, the user can plug either end of the cable into either device. The plugs are flat, but will work if inserted right-side-up or upside-down. The USB-C plugs have two-fold rotational symmetry because a plug may be inserted into a receptacle in either of two orientations. Electrically, USB-C plugs are not symmetric, as ...