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2. AC adapter - Wikipedia

   en.wikipedia.org/wiki/AC_adapter

   An AC adapter or AC/DC adapter (also called a wall charger, power adapter, power brick, or wall wart) [1] is a type of external power supply, often enclosed in a case similar to an AC plug. [2] AC adapters deliver electric power to devices that lack internal components to draw voltage and power from mains power themselves.

3. Universal Power Adapter for Mobile Devices - Wikipedia

   en.wikipedia.org/wiki/Universal_Power_Adapter...

   The standard defines an AC adapter to power devices requiring from 10 W to 130 W (~20 V × 6.5 A) or (extended voltage option) up to 240 W (60 V × 4 A). [2] A new connector (that does not mate with any previously existing connector) is proposed for a lifetime of about ten years with multiple brands and models. [3]

4. Power supply unit (computer) - Wikipedia

   en.wikipedia.org/wiki/Power_supply_unit_(computer)

   External power supply could send data about itself (power, current and voltage ratings) to the computer. For example, genuine Dell power source uses 1-Wire protocol to send data by third wire to the laptop. The laptop then refuses a non-matching adapter. [35] Some computers use a single-voltage 12 V power supply.

5. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   This feature has also been implemented on some laptop docking stations allowing device charging even when no laptop is present. [81] On laptops, charging devices from the USB port when it is not being powered from AC drains the laptop battery; most laptops have a facility to stop charging if their own battery charge level gets too low. [82]

6. HP TouchPad - Wikipedia

   en.wikipedia.org/wiki/HP_TouchPad

   It must be plugged into a high-power USB power adapter, such as the HP TouchPad power adapter or a newer high-current USB adapter. HP shows a warning in the user manual to not plug it into a laptop. In North America, the Touchstone ships with the same AC power adapter that is included with the TouchPad.

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   mail.aol.com

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