Shares of two Korean battery makers spiked Monday as they ended a two-year legal dispute over electric vehicle (EV) battery technology, which cleared uncertainty over their businesses.

On Sunday, LG Chem-owned LG Energy Solution Ltd. and SK Innovation Co. reached a last-minute settlement in a bitter US trade dispute, just one day before an import ban on SK was to take effect.

SK Innovation agreed to pay 2 trillion won ($1.78 billion) in compensation, half in cash and half in royalty, to its bigger Korean rival, and the two companies said they will not file suits regarding EV battery technology over the next decade.

On Monday, shares of LG Chem gained 0.62 percent to 817,000 won and SK Innovation jumped 11.97 percent to 266,500 won on the main KOSPI market.

The settlement was a boon for SK Innovation, which could have faced a 10-year import ban of its batteries into the US if neither President Joe Biden intervened nor the two companies reached an agreement before the Sunday deadline.

Their compromise will allow SK to complete the construction of the $2.6 billion electric vehicle battery plant in Georgia, which will supply electric vehicle batteries for Ford and Volkswagen.

"The settlement cleared uncertainty over (SK Innovation's) battery business and its push in the US market," SK Innovation CEO Kim Jun said in an email to its employees after the agreement. "We will step up construction of the Georgia plant and will expand investment and partnership to target the rising EV market."

LG Chem, the parent of LG Energy Solution, is expected to benefit from the settlement money as it turned to red last year due to recall costs for Hyundai Motor Co.'s Kona EVs over fire risks.

In early March, LG Chem corrected its 2020 operating profit from 2.3 trillion won to 1.8 trillion won, reflecting 555 billion won in recall costs for Kona EVs. (Yonhap)