INX - Solid State Batteries

A Shenzhen startup is shipping a battery that doubles eVTOL flight time, beating out two of China's solid-state battery unicorns

INX (欣界能源, “Xinjie Energy”), a Shenzhen solid-state battery maker, raised more than $100M in a B round at a $1B post-money valuation. Its batteries doubled the flight time of an EHang 216-S eVTOL, from 23 to 48 minutes (EHang is also an investor, having backed both the Pre-A and A rounds). In December 2025, INX’s Hangzhou production line started shipping cells. Seven months later, it had delivered more than 10 million cells, what lead investor Puhua Capital (普华资本) describes as the first publicly reported case of continuous mass production on the lithium-metal anode route. Dachen (达晨财智) and CMB International (招银国际) also participated.

The EHang 216-S that flew 48 minutes on INX’s Falcon (猎鹰) lithium-metal cells, more than doubling its previous endurance. Source: INX.

The low altitude economy

China’s 低空经济 (”low-altitude economy”) is the government’s umbrella for all civilian use of low-altitude airspace, from eVTOL passenger aircraft and delivery drones to power line inspection, agricultural spraying, and emergency response.

China’s low-altitude economy covers the airspace from ground level to roughly 1,000 meters, layered by aircraft type: consumer drones below 120m, unmanned commercial drones up to 300m, and eVTOLs and manned aircraft above. Source: Zhihu / 明吉微半导体.

Chinese megacities are running out of…