Related <i>EU law mandating universal chargers for devices comes into force</i> (269 points, 2 days ago, 389 comments) <a href="https://news.ycombinator.com/item?id=42534851">https://news.ycombinator.com/item?id=42534851</a>
I am always disconcerted by the Raspberry Pi which takes a usb power supply but needs about 2 amps at 5 volts which most chargers won't support.<p>I think fast chargers raise the voltage rather than the current.