Thus Batu Arang played an important role in the Malayan economy by introducing electricity to the Malayan state and improving tin mining through dredges, which outpaced Asian methods of mining tin. Coal production peaked in 1940, when Batu Arang produced 781,509 tons of coal.
Batu Arang's contributions to the Malayan economy were significant, as he introduced electricity and improved tin mining using dredges, which surpassed Asian methods of tin extraction. Coal production reached its peak in 1940, with Batu Arang producing 781,509 tons of coal.