That's not accurate. More advanced lithium batteries come very close to 300Wh/kg. "The Eve Energy solid-state cells have an energy density of 300 Wh/kg, for instance, a marked increase from a bit over 200 Wh/kg in current drones, eVTOLs, or humanoid robots."
Tesla battery suppliers Panasonic and CATL have scoffed at the viability of solid-state batteries for electric vehicles in the near future but pegged them suitable for applications like drones. One of the top battery making rivals of CATL has now managed to organize mass solid-state battery production with 10 Ah cells for UAVs and humanoid robots like Tesla Optimus.
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