I've been using a powered USB hub for awhile now. I needed to charge my JX10 so I decided to use the short cord and plug directly into my laptop. As soon as I plugged the JX10 in, my IBM thinkpad died. I had to unplug the laptop and remove the battery for the laptop to boot back up. After this happened my JX 10 started flashing red and would not work. I decided to check it on another laptop and I received the message USB powersurge. Jabra will replace it under warranty, but I thought I would give all the folks at TC a heads up. From now on I will only charge it on a dedicated wall outlet.