Indonesia’s Energy and Mineral Resources (ESDM) Minister Bahlil Lahadalia called on nickel producers to curb production volumes to help stabilize. Indonesia’s Energy and Mineral Resources (ESDM) Minister Bahlil Lahadalia called on nickel producers to curb production volumes to help stabilize international prices. Nickel prices have been on an explosive rally as the market bets that Indonesia, the world's largest producer of the battery metal, will hit the brakes on its runaway output.