A lithium-ion battery plant by an Indonesian company and China's CATL is expected to be in operation by the end of 2026 with initial capacity of 6.9 gigawatt hours, an Indonesian official said on Sunday.

The plant is expected to expand to produce electric vehicle batteries with storage capacity of up to 15 GWh, said energy ministry spokeswoman Dwi Anggia, adding the output will be sold to domestic and overseas markets.