USB. COmputer vs. ac outlet. The AC outlet charges without an issue. The usb on the computer wasn't completed charging even aft 6 hours. Yes. I did a disconnect first.
Btw, if I don't disconnect, the charge time is also different? or as long as its connected it won't charge? Example: I noticed if I'm moving files over to the ipod (alot of files) after its done and I remove the ipod, I noticed the battery indicator is lower even though I had a full charge before I started transfering files. So it looked like the battery was draining when when plugged into the usb port.