The miners halted work last week in support of colleagues who were protesting in the capital Sarajevo against what they said were violations of work and pay regulations.
BloombergNEF data show that lithium-ion battery pack prices fell 6% from 2020 to 2021 but rising commodity prices are putting pressure on the industry.
Copper, nickel and zinc prices could be saved from worst effects of any new virus-related restrictions as historically low global stockpiles intensify fears of supply disruption.