** Shares of Australia-listed Asian Battery Metals rise as much as 9.4% to A$0.058, their largest intraday pct gain since Dec. 2
** UK-based critical battery mineral explorer reports massive high-grade sulphide mineralisation at its Oval project in Mongolia
** Says drilling result is very encouraging for future exploration of project's copper-nickel mineral system
** Stock down 14% YTD, including current session's moves
(Reporting by Nikita Maria Jino in Bengaluru)
((Nikita.Jino@thomsonreuters.com;))