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Juice jacking is not possible if a device is charged via a trusted AC adapter or battery backup device, or if using a USB cable with only power wires. For USB cables with data wires, a USB data blocker (sometimes called a USB condom) [25] can be connected between device and charging port to disallow a data connection. [26]
The throughput of each USB port is determined by the slower speed of either the USB port or the USB device connected to the port. High-speed USB 2.0 hubs contain devices called transaction translators that convert between high-speed USB 2.0 buses and full and low speed buses. There may be one translator per hub or per port.
USB Battery Charging (BC) defines a charging port, which may be a charging downstream port (CDP), with data, or a dedicated charging port (DCP), without data. Dedicated charging ports can be found on USB power adapters to run attached devices and battery packs. Charging ports on a host with both kinds will be labeled. [59]
Common external power supply and the USB Standard-A and Micro-B ends of the detachable cable. The common external power supply (Common EPS) was a European Commission (EC) specification for a universal charger for smartphones sold within the European Union.
For USB-powered devices, it is 5 volts. Later, battery charging protocols such as Quick Charge by Qualcomm and USB Power Delivery started allowing charged devices to request different voltages suited for their needs, usually higher voltages to increase power without adding heat to the copper wires of the USB cable. In the past, "SuperCharge" by ...
This document specified the three components of a common charging solution (CCS): a charging and local data connector (CLD) on the "terminal" (e.g., a mobile phone) consisting of a micro USB-B (2.0) or micro USB-AB (2.0) receptacle; a common power supply (CPS) with a USB type-A receptacle; and a detachable USB type-A to micro USB-B (2.0) cable ...
Quick Charge is a proprietary technology that can charge battery-powered devices, primarily mobile phones, at power levels exceeding the 7.5 watts (5 volts at 1.5 amps) supported by the USB BC 1.2 standard, using existing USB cables. The higher voltage available allows more power (watts) to be supplied through wires without excessive heating.
The 2nd generation AirPods Pro was updated to a USB-C charging case and the MagSafe Duo Charger and MagSafe Battery Pack, which used the Lightning connector, were discontinued. [ 19 ] The Lightning connector (used on iPhone 5 until iPhone 14 ) has a technical constraint that limits video output using the Lightning Digital AV HDMI Adapter to a ...