When selecting an USB extension cable to extend power cord, what are the relevant considerations? I want to use USB extension cords to extend the USB power cords for my Android device.  What are the factors that could affect normal charging behavior?  (Consider "normal charging behavior" to be charging speed and long-term effects on the device battery when using only the manufacturer power cord/adapter.)
To be honest I think that its affected by the voltage on the USB port. Some ports are only .5V while others are 1V.