Delete comment from: Ken Shirriff's blog
U R Clueless. Apple chargers are different from standard chargers:
http://en.wikipedia.org/wiki/Universal_Serial_Bus
You can make Apple-compatible non-standard charger into standard 2000 mA supercharger by connecting +D to -D. Thereafter it wont charge Apple of course, but who cares.
So the author should have tested first if the charger was a standard USB-charger or Apple-crapped. Because now the test results are useless, because non-standard charger can deliver only max 500 mA to a standard device.
Oct 29, 2012, 5:56:41 PM
Posted to A dozen USB chargers in the lab: Apple is very good, but not quite the best