John Mayer’s “Battle Studies” (2009) Published November 28, 2009 at 400 × 398 in Music Review: John Mayer’s “Battle Studies” (2009) John Mayer’s “Battle Studies” (2009) John Mayer’s new 2009 studio album, “Battle Studies.” Share this:Click to email this to a friend (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens in new window)