** Shares of Power Minerals PNN.AX rise 16.7% to A$0.07, their biggest intraday pct gain since late September 2024
** The lithium explorer hits its highest level since April 7
** Co signs a binding letter of intent for an option to acquire Santa Anna Niobium Project in Brazil
** About 318,099 shares change hand, 1.7 times their 30-day average trading volume
** Stock down 34.8% this year, as of last close
(Reporting by John Biju in Bengaluru)
((John.Biju@thomsonreuters.com;))