PMA Charger through USB

[Neibl]

Anyone know if PMA chargers will charge your phone if they are connected to a USB port (say on my work laptop) and not a wall socket?

Not sure how the Duracell ones are wired, but I did notice the official LG stand one they are advertising has a micro USB input on the back so any USB to micro-USB could be used, but that doesn't mean it will work. My nexus QI chargers worked through USB, but not the newer nexus QI chargers (square one with magnet, old one for 4 worked great).

Thanks in advance