But according to the updated feasibility study total capital expenditure for the life of Wafi-Golpu mine will fall by about the same amount to $5.5 billion.
Nervous Asian battery makers are turning to early-stage cobalt projects in Australia and Canada to lock in supplies of the critical battery ingredient ahead of expected shortages as demand for electric vehicles revs up.
German researchers say cobalt-free battery technologies — including post-lithium technologies based on non-critical elements — are the best way to avoid supply issues in the long term.