Tesla has built the world's biggest battery in Australia

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Elon Musk is making good on his promise to help solve an energy crisis in Australia.

Tesla (TSLA) has "fully installed" the world's largest lithium ion battery in South Australia, the state government said in a statement on Thursday.
Tesla teamed up with a French renewable energy firm and the local government to install the battery, which Musk promised to deliver within 100 days of signing a contract -- or it would be free.
The battery needs to be operational by early December for Musk to meet his own deadline.

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