** Shares of Sayona Mining SYA.AX rise as much as 5.3% to
A$0.040, posting their biggest intraday pct gain since March 14
** Stock hits its highest level since March 21
** Lithium producer says operational review supports North
American Lithium (NAL) ramp-up plan
** NAL is jointly owned by co and Piedmont Lithium PLL.O
** JV partners agreed to continue NAL production ramp-up
towards steady state production
** Co targets to reduce NAL unit operating cost by end of
2024
** Stock down 46.5% YTD, as of last close
(Reporting by Neha Soni in Bengaluru)
((Neha.Soni@thomsonreuters.com))