Tesla has reached the half-way point in its plan to build the world’s biggest battery, in South Australia.
The plan to build the 100MW (129MWh) lithium battery grew out of a Twitter bet between Tesla boss Elon Musk and Australian software entrepreneur Mike Cannon-Brookes.
Mr Musk said Tesla would build the wind-charged battery in 100 days or the state would not have to pay for it.
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