Is there a common source for a cable with a micro USB connector? I have a drawer-full of the USB and mini USB cables, but I need a micro connector to make an external battery for the tablet. The cables I have now are needed for the regular charging the tablet or data transfers, so I can't cut those up. A common and cheap source could benefit in a lot of ways if I wanted to experiment wit the USB port. I have a Big Lots, KMart, Walmart, and Radio Shack store nearby. Unfortunately, I resist going to Radio Shack, as the first thing they want to know is what "phone" you have. thx.