https://www.reuters.com/article/us-tesla-batteryday/elon-musk-tempers-expectations-for-tesla-battery-day-stock-dips-5-idUSKCN26D19P >Tesla Inc CEO Elon Musk on Tuesday is scheduled to showcase the company's advanced battery technology, with investors expecting he will outline how the company's electric vehicles will surpass the cost and convenience of internal combustion engines.