Battle Studies [Import] (2 Lp's)It's no secret that John Mayer is a 21st Century Fox, wining and dining women all through tabloid headlines, so it's about time he delivered an album that traded upon his loverman persona and Battle Studies is that record in spades. Retaining more than a modicum of the slick, soul blues undertones of Continuum, Mayer fashions a modern groove album, a record that maintains a smooth seductive vibe so thoroughly it spills into a one man band cover of