SYDNEY (AP) — Tesla announced on Friday it will build the world's largest lithium-ion battery in southern Australia, part of a bid to solve an energy crisis that has led to ongoing blackouts across the region.

Tesla will partner with French renewable energy company Neoen to build the 100-megawatt battery farm in South Australia state, with Tesla CEO Elon Musk promising to deliver the system within 100 days of signing the contract or it will be free. The billionaire entrepreneur originally made the 100-day pledge via Twitter in March, and he and South Australia's government confirmed on Friday...