Svippy writes "Apple has patented a technology for new generations of iPods that would detect when a user tries to operate the iPod on an unauthorised machine ... and will refuse to charge. Indefinitely. From the article: 'Every portable gadget with a rechargeable battery has a charging circuit that recognises when the external mains charger has been plugged in. It then manages the transfer of current to the battery. Apple's patent suggests that by attaching a "guardian circuit" to the charging circuit, it would be possible to block the charging process. When a device is plugged into an unauthorised computer, software would compare a security code in the device to a code buried in the software in the computer. Apple already employs a similar technology to "pair" iPods to iTunes running on a specific Mac or PC. If the codes do not match, then the guardian circuit could be triggered to prevent any further charging.'"