Slow-ish USB charging on RX100
Not true. It ups the USB bus to 2 amps from 500 milliamps and works with any device. Apple USB chargers output 2 amps.
ASUS Ai Charger - http://event.asus.com/mb/2010/ai_charger/
Unfortunately, AFAIK it only works for Apple devices (iPhone, iPad)-- hide signature --