Chinese sodium-ion battery matches Tesla on build quality, teardown finds

A commercial sodium-ion battery from Chinese manufacturer Hina matches Tesla’s lithium-ion cells on manufacturing quality and internal design, according to an independent teardown published in the Cell Press journal Cell Reports Physical Science.

Researchers at Germany’s RWTH Aachen University measured cell-to-cell resistance varying by just 5.3% across 120 cells — a sign of tightly controlled mass production rivaling the best lithium cells on the market.