There are a lot of factors to battery life. so I can't speak for every one and there are several battery related threads. Mine is set to 4G (LTE/CDMA, not global), WiFi on all time, living in medium 4G signal area (-90~-105dbm). Also turned off auto sync on Google+, Google Map location report/history. With this setting I'm very happy with battery life of regular Razr HD.
If lightly used as phone with calls, texts, emails, it's above 80% after 12 hours of working day. With more usage like browsing, videos, screen on more than 2 hours, it's still easily above 60% after 12 hours. I don't have much time to watch videos during day time at work, so it's hard for me to push it below 50%. Of course Maxx HD would have even more lasting power, but for me this is more than good enough.