USB port?

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1) How many volts is a USB port?
The average power of a USB port is about 5 volts. Your USB device will be able to draw out a maximum of 500 milliamperes (mA), but most default to 100 mA until prompted to provide more power by the device software.

2) Are all USB ports the same voltage?
All USB cords carry the same 5V, regardless of if it's got a 30-pin head or a microUSB plug, whether it's first-party or third. That means DC chargers are now brand agnostic; if the volts, amps, and connectors are compatible, an Apple wall wart can charge an HTC just as easily as a Samsung.

3) Is a USB port AC or DC power?
It is simply a USB cable, which allows my tablet to charge from a DC USB port in a car or laptop. Both sides have DC, so no conversion is required. ... The same USB cable plugs in to a little black box that plugs in to an AC outlet – the box converts AC to DC.

4) How many watts can a USB port provide?
In the USB 1.0 and 2.0 specs, a standard downstream port is capable of delivering up to 500mA (0.5A); with USB 3.0, it moves up to 900mA (0.9A). The charging downstream and dedicated charging ports provide up to 1,500mA (1.5A).

5) Can 5 volts kill you?
It's The Current That Kills. Offhand it would seem that a shock of 10,000 volts would be more deadly than 100 volts. But this is not so! ... While any amount of current over 10 milliamps (0.01 amp) is capable of producing painful to severe shock, currents between 100 and 200 mA (0.1 to 0.2 amp) are lethal.

6) What is the difference between 2.0 and 3.0 flash drive?
When comparing 2.0 and 3.0 there are a few major differences. First the transfer rates: USB 2.0 offers transfer rates of 480 Mbps and USB 3.0 offers transfer rates of 4.8 Gbps - that's 10 times faster. Note that the transfer speeds also depend on the device in use in addition to the bus type and USB ports and cables.

7) Do I need a voltage converter for USB?
It means that the charger will convert any standard input voltage to the correct output voltage. You can use a USB charger on all continents without using a voltage converter. All you need is a country specific adapter plug. You can also use the 12 volt power port in your automobile.

8) Can I plug my iPhone into 220 volts?
Apple's iPhone power adapter takes AC input that is between 100 Volt (The U.S. is typically 110 Volt) and 240 (Europe is typically 220 Volt) and lets out a nice regular stream of 5 or 10-volt power for the iPhone. So as long as you have a plug adapter, Apple has you covered for the voltage.

9) How do I charge my phone in my car with USB?
USB to 12-Volt Adapter. This type of USB charger will plug into your car's cigarette lighter slot. USB chargers have one or more USB interfaces on the other end. You can then connect your music player or other devices via the USB cable.

10) How can I make my USB charge faster?
To speed up the amount of time it takes to charge your cell phone, you can:
A. Switch it to Airplane Mode while charging.
B. Use a wall charger versus charging it from your computer or laptop.
C. Use a quick charger.
D. Turn it off or stop using it while charging.
E. Turn off unnecessary features.

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