While the Nook Color uses the mini-USB connector for charging the device, it is not a standard connector. It was explained to me that the Nook needs more current than other typical devices, so while it has what looks like a "standard mini-USB" connector, it is actually a bit longer than a generic cable. One must use the USB adapter and cable that came with the Nook to charge it. Only their unique cable is long enough to make the contacts for charging the device. I expect a standard USB will just be short of making contact. I am concerned about what could happen if I accidentally plug the Nook charging cable into some other device. Am I going to burn it out with too much power?