I have a brand new battery (but same situation was with the old one) and when I connect my Note to the PC USB connector or when I plug it in my car charger, phone is still discharging if the screen is on. If the screen is off and if I close all apps, wi-fi and GPS it is charging but very, very, very slowly. Only if I plug phone into wall charger it doesn't matter if the screen is on or off, is it wi-fi or GPS turned on or off, phone is charging normally. I try few different cables, but still the same. Computer have only USB 2.0 and 3.0 ports so it isn't a USB 1.1 case. I have also HTC HD2 and it is charging normally no matter where it is plugged - wall, PC, car (same chargers, same cables, same PC...) HD2 is charging in my car even if the GPS and navigation is turned on.