Residents of this sprawling township famous for its resistance to white-minority rule are fighting a battle they thought consigned to history: keeping the lights on. National power company Eskom Holdings Ltd. is reeling from years of underinvestment and poor management, surrendering to power outages that frequently plunge Soweto’s 1.3 million residents into darkness. Nonayona Mkeshana and her neighbors have resorted to cooking over open fires and singing and dancing in the street now that television sets have gone dark. “We’ve had to get used to it, to survive,” said Ms. Mkeshana, a 59-year-old grandmother who lives with her son and his children. South Africa’s Treasury on Wednesday said it sold its stake in mobile company Vodacom Group Ltd. VOD -1.87 % to raise $2 billion to keep Eskom solvent. Chief Executive Brian Molefe said blackouts could continue for months as Eskom catches up on years of neglected […]