Sodium ion is much safer. Electrolytes in it may still be flammable, but CATL says there should be no thermal runaway or spontaneous combustion like Lithium-Ion

Sodium ion is much safer. Electrolytes in it may still be flammable, but CATL says there should be no thermal runaway or spontaneous combustion like Lithium-Ion. They’re also safer to ship without the hazmat warnings in the packaging.