One electric vehicle (EV) battery cell is produced in just one second on average, with an "almost-perfect" failure rate of just one in a billion: that's what the world's top battery maker CATL can do in its factories. How hard is it to produce what are touted as the world's best EV batteries?

In this episode of BizFocus, CGTN's Xu Yi visits a factory operated by CATL, the world's top EV battery supplier and recognized by the World Economic Forum as the first "Lighthouse Factory" in the lithium-ion battery industry, to find answers.