[jhautz]

I cant speak to 300W. The highest load I ever ran on it was two 5s 5000mah packs charging at 1C at the same time. So it was doing around 92 watts on each pack... around 185watts total. So I do know it does more than 170 watts.

I think that I read that there were some strange little issues like that when it was first released, but the cool thing about the charger is as they find problems they can fix the software and you can download and install updates as they release them with the USB data cable. Lets you track very detailed charging info on the computer is you want to also.