Battle Studies is the fourth studio album by American rock musician John Mayer, released November 17, 2009 on Columbia Records in the United States. Production for the album took place during February to August 2009 at Battle Studies recording studio in Calabasas, California, Capitol Studios in Hollywood, California, and The Village in West Los Angeles, California, and was handled by Mayer and Steve Jordan. The album debuted at number one on the US Billboard 200 chart, selling 286,000 copies in its first week. It achieved successful sales in several other countries and produced two singles that attained chart success. Upon its release, Battle Studies received generally mixed to positive reviews from most music critics. The album has sold 880,000 copies in the United States. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.