** Future Battery Minerals gains as much as 21.1% to A$0.022, its highest since Sept. 27

** Mineral explorer sells its 80% stake in Nevada Lithium Project to Austroid Corporation in A$4 mln ($2.6 mln) cash deal

** Says disposal will help it to focus on Kangaroo Hills & Miriam Lithium Project in Western Australia

** Over 1.3 mln shares traded, ~4x the 30-day avg, in busiest session since Aug. 7

** Stock down ~74% YTD

($1 = A$1.5163)

(Reporting by Kumar Tanishk in Bengaluru)

((Tanishk.Kumar@thomsonreuters.com;))