Hi Hi,
Just noticed that if I plug my D300 to the USB port of my laptop, it drain power very quickly on the cam. While, I can keep the cam power on all the time, without any power drain. Once I plug in to a USB port overnight, the whole almost fully charged battery is drain, totally.
So, watch out for it. If not neccessary, don't plug your D300 to USB port and left it there.
Just noticed that if I plug my D300 to the USB port of my laptop, it drain power very quickly on the cam. While, I can keep the cam power on all the time, without any power drain. Once I plug in to a USB port overnight, the whole almost fully charged battery is drain, totally.
So, watch out for it. If not neccessary, don't plug your D300 to USB port and left it there.