What sucks is some devices will tell you "Invalid Charger" or "Unsupported Charger" if you don't use the right one. IIRC, my niece's phone does this when plugged into my BlackBerry 9650 charger, but will work fine when plugged into my Apple AC to USB adapter w/ a data cable.
My Bluetooth charger (Plantronics Discovery 975 and a Backbeat 903) can interchange for either device, but will not charge my BlackBerry... but my BB charger will charge my Plantronics devices. I'd have to look, but I think the Plantronics chargers don't put out the same current as the BB charger.
"F is for Fire that burns down the whole town...
U is for Uranium...... Bombs...
N is for NO SURVIVORS!!!!!" Sheldon Plankton