NEW YORK -- South Korean and Japanese battery companies are set to expand their market share in the United States as regulations increasingly restrict Chinese competitors' foothold. South Korea's LG Energy Solution, Samsung SDI and SK On have been scaling up their local production and strengthening partnerships, while Japanese tech giant Panasonic recently began local production of its lithium-ion batteries. These developments come even as U.S. President Donald Trump's spending legislation pares back tax incentives for wind, solar and electric vehicles.