** Shares of Power Minerals rise as much as 13% to A$0.13, posting their biggest intraday pct gain since Sept. 27
** Australian mineral explorer completes due diligence for joint venture agreement with China-based Heng Li Technology to develop its Pular lithium project in Argentina
** Says under the JV, Heng Li to fully fund and manage project development
** Says Heng Li to invest $5 mln and purchase 100% of lithium concentrate produced at the project
** Power Minerals stock hits highest level since Oct. 1
** Stock down ~42.9% so far this year
(Reporting by Nikita Maria Jino in Bengaluru)
((Nikita.Jino@thomsonreuters.com;))