I bought a USB 2.0 extension for my iPad to use the wall charger instead of buying the longer one from Apple. After some testing it seems that when using the USB extension cable I am not getting the full power from the wall outlet as my power will continue to drain when using apps even while plugged in. It drains slower yes but still will go down. Also takes much much longer to charge when. Not using the iPad going through the USB extension than without Anyone else noticed this or can test it out as well. Using just the cable and wall charger that came with the iPad it charges from a complete drain in less tha. 4 hours it seems yet with the USB extension that number grows to 6-8 hours.