Newegg.com - Nippon Labs Black 15 ft. USB cable A/Male to A/Female extension USB cable Model USB-15-MF-BKThis works perfectly. I have 2 of these 18 footers and a beige 15 foot, all work perfect with charging. Keep in mind though, data can ONLY travel 18 feet through USB. (with the exception of repeaters). A 15 foot usb extension cable + the 3 foot Motorola USB Mini to Male works fine for data transfer.