I am looking for a DKU-5 cable. I see several on E-bay, but somj look different than others...Who has one and can tell me the difference between ones that will let the phone charge while plugged into the PC? What is F/bus and Mbus and then the standard nokia ones that don't seem to support f/bus. I need some help. someone please enlighten me as to the difference of these cables and what it means.

Thanks