** Shares of Atlantic Lithium A11.AX rise as much as 16.1% to A$0.325, heading for their best day since March 18
** Lithium-focused exploration and development firm enters deal for China's Zhejiang Huayou 603799.SS to buy shares in A11 for $0.25486 per share
** Deal values Atlantic Lithium at $210 million
** A11 says issue price is at 26.6% premium to its last close
** A11 stock up over 45% this year, including the day's move
(Reporting by Rajasik Mukherjee in Bengaluru)
((Rajasik.Mukherjee@thomsonreuters.com))