"Its methanol fuel cell was designed to generate enough electricity for a flight time of up to 12 hours per charge. By comparison, a low-cost lithium-powered Chinese DJI Spark “selfie drone” can stay in the air for 15 minutes, while the professional-grade DJI Inspire 2 can barely top half an hour using a lithium-ion battery pack.
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Over the years, the work provided long-term energy supplies for military platforms, including an unmanned submersible that can operate at a depth of more than 10,000 metres (32,800ft), according the institute’s website."
https://www.scmp.com/news/china/science/article/3042818/chinese-scientists-create-game-changer-methanol-battery-keeps
...
Over the years, the work provided long-term energy supplies for military platforms, including an unmanned submersible that can operate at a depth of more than 10,000 metres (32,800ft), according the institute’s website."
https://www.scmp.com/news/china/science/article/3042818/chinese-scientists-create-game-changer-methanol-battery-keeps