 Rio Tinto is rumoured to be increasing its exposure to the commodity amid the growing battery metals revolution. Broker Stifel GMP has taken a closer look at potential lithium targets for the mining titan after Rios acquisition in March of the Rincon lithium brine project in Argentina for 825 million and recent news that Serbian Prime Minister Ana Brnabic has announced seeing little chance of reviving the behemoths 2.4 billion Jadar lithium project, on which licences were revoked earlier this year amid environmental protests. 