I've looked through numerous related RIM articles and searched these forums (maybe not using the right criteria?) and I cannot find an explanation for the following:
We have found that, as a general rule, our BlackBerry devices (models range 6210-8700) charge MUCH faster when either connected directly to the wall or to a computer with Desktop Manager installed. If we just provide the USB driver (no Desktop Mgr or Handheld Mgr installed), it will be recognized by the OS (XP SP2) and charge, but it takes HOURS to charge rather than minutes via the other 2 methods.
This seems to hold true whether the desktop it's being attached to is a laptop, docked laptop, USB hub or standard desktop machine.
Anyone have an explanation for this? I sure don't...