John Mayer - Battle Studies Battle Studies is the fourth studio album John Mayer, released on November 17, 2009, by Columbia Records.
- Disc 1 -
1 Heartbreak Warfare
2 All We Ever Do Is Say Goodbye
3 Half of My Heart
- Disc 2 -
1 Who Says
2 Perfectly Lonely
3 Assassin
- Disc 3 -
1 Crossroads
2 War of My Life
3 Edge of Desire
- Disc 4 -
1 Do You Know Me
2 Friends, Lovers or Nothing