Charging and listening...can it be done?

Not all USB wall chargers will work.  I bought 5 for $2.86 each from ebay.  They do not work.  It seems that pins 2 and 3 have to be at 2.0 - 2.5 volts else the Fuze thinks it’s in write mode.  I have ordered some 2.4V zener diodes to make the mod.  The mod is easy if your into that stuff.