Problem with charging my Fuze

@tomjensen wrote:

Best solution is to buy an external USB AC adapter for a few dollars.

Even though my 800mA USB adapter seems to work, do you know whether the Fuze prefers a specific power output? By the way, my USB Hub with four outlets and a 2,5A external power supply unit which I use for file transfers seems to do the charging job as well even with the PC turned off.