Piedmont Lithium PLL.AX on Monday said it signed a five-year deal with Tesla Inc TSLA.O to supply high-purity lithium ore mineral to the U.S. electric carmaker, prompting an 83% surge in the Australian lithium miner's shares. The initial five-year agreement implies that Piedmont will supply about a third of its planned 160,000-tonnes-per-year spodumene concentrate produce from its deposits in North Carolina. Both companies have an option to extend the deal for another five years. Shares of the Australian miner touched their highest since May 2007.