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Comment Re:Beware public charging stations... (Score 2, Informative) 228

"Public charging ports don't have data lines"

Your claim (and that of other's, below) is simply wrong.

Because, any USB charger expected to work with a wide range of devices does in fact have connections to the USB data pins. If they are unconnected, a USB device can draw no more "one unit load" (0.1 A) from the port. If the data lines are actively used, a device can negotiate to 500 mA. Using the USB charging spec, the data pins are shorted together or with a 200 ohm resistor (depends on the version of the spec), and a device it can draw up to 1.5 A. But that's still unlikely to cause problems with other ports.

What is a concern is that there are lots of proprietary extensions beyond the USB spec. Apple and Qualcomm are two big players in that regard, using the data lines to signal the availability of current and/or voltages more that the USB spec itself allows. Modern "universal" charging ports actively use the USB data lines to identify the device type and then negotiate available power. These types of ports are becoming more common everyday.

Even if ports are sufficiently isolated so that one of these "killers" couldn't effect other ports, it's possible that they could damage the port they're plugged into, potentially causing it to deliver voltage damaging to other devices. Even though ESD protection is likely provided (just as it is on a computer's USB port), that's meant to handle only low energy situations (high volt/low amps). These killers are designed to accumulate, then deliver a much greater charge than that.

Comment They're lying. (Score 3, Insightful) 55

"AT&T said exempting services like DirecTV Now from data caps saves customers money. "

No, it doesn't. Wireless network costs are shifted onto consumers who don't buy their streaming services. If all the costs of streaming bandwidth are included in the price of the streaming service, then reduce the cost of that service and let the consumers pay for the bandwidth directly, just like customers who use competitive streaming services.

Comment Hypocrisy. (Score 0) 1044

hate speech is "speech that offends, threatens, or insults groups, based on ... or other traits.

So, Twitter, by threating these users based on their traits, is itself engaging in politically incorrect "hate speech." They'd better just shutter the windows.

What ever happened to "Sticks and stones may break my bones, but words will never hurt me?" All you SJWs, here's a fact - you have no right to not be offended. Learn to live with it.

(oops, I guess that's "hate speech," since I just insulted those who would claim offense)

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