Battalion Oil (BATL) 8-K Departure of Directors or Certain Officers

Exhibit 99.1

May 8, 2023

Please accept this letter of resignation from my role as Director of Battalion Oil effective Monday, May 8, 2023. I also acknowledge that there were no disagreements between me and the Board that prompted this decision.

I want to thank the Board of Directors and the Management team. I wish the Company success going forward.

Sincerely,

​ ​/s/ Allen Li​ ​

Allen Li

www.battalionoil.com|3505 West Sam Houston Parkway North, Suite 300, Houston, Texas 77043| 832.538.0300