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Japanese researchers have developed a portable solid oxide fuel cell (SOFC) microreactor that efficiently generates electricity and addresses thermal management and safety concerns. The palm-sized device can start within 5 minutes at room temperature and features a unique yttria-stabilized zirconia structure to minimize thermal conduction and prevent cracking. This innovation, published in Microsystems & Nanoengineering, aims to serve as a power source for drones, compact robots, and AI hardware.