I have the Razr. Realistically with the Smart Action app that is built into the Razr, I get about a full day on a charge if I work both jobs and limited usage. If I only work my regular day job and goof off on my phone in the late afternoon/evening, my battery is almost dead by the end of the night. From what I have heard and seen, the Razrmaxx gets double the life of the Razr.
This whole feeling like poo the past couple days hasn't helped me out when I had to return to the office. At least my new headlights came in and I was able to get them Lamin-x pretty quickly and easily.