[RAZR HD Q&A, Help & Troubleshooting] CoinCoin88:
A few thoughts so far. I haven't tried Greenify or Unbounce yet, this will be the "final stage". For now I'm trying to minimize wakelocks as much as possible without installing third-party apps.

Here are a quick review of what I've found (NB: in the following I translated the menu names myself from french to english and didn't check their actual name... but it shouldn't be too hard to figure out which ones I'm referring to if the name is not exactly right):

1) Disabled Google Now and all "Google Location settings" (i.e. "Update location" and "Location history", found within "Google settings" in the drawer).

2) Set location settings to "minimize battery", that is with network and wi-fi.

3) In wi-fi advanced settings, disabled "search always available"

4) Locked the phone to 2G/3G only, because 4G coverage from my carrier (Free Mobile for the frenchies here ;)) is erratic at best, and caused many 3G/4G switches

5) Some "light" de-bloat (froze all Google apps I'm not using). At first I froze all my apps to mimick a fresh stock system, but there were really not that much difference.

Note that all the tests were ran (mostly) in the same location, on different days, so signal quality should be rather constant (and good) and therefore is not acting as a confounding factor in my tests.

Whats happening when 3G and Wi-Fi are both off ?

Obviously, disabling 3G and wifi gives a very good battery life. I'm talking about something like 2h screen-on and probably 30-40% after a full day (9am to midnight, roughly). I'll double check the exact values for this and update this post with a screenshot asap (= in the upcoming days). With this setting, wakelocks actually correspond to screen-on time. So it's probably the best one can achieve.

edit:

1h of voice communication, 1h15 of screen-on time, 10-15 sms, 1 received MMS (had to enable 3G a few seconds for that of course) => see Screenshot_2014-10-27-23-22-14.png

The decrease at the end corresponds to wifi+3G when I got back home and started using the phone "heavily". Roughly, 40% decrease in 12h. That is what I call a good battery life. Notice how the wakelocks closely match the screen on periods.

Whats happening when 3G is ON and Wi-Fi is OFF

We've discussed a bit the "fastdormancy" thing earlier here. Spending a whole day on 3G made the "modem fastdormancy" process drain a high share of battery (10-20% ? Can't remember exactly, but it was in the top-5 list of draining apps, and had a big wakelock time). Further proof that my carrier doesn't support it. I've therefore edited my build.prop to set

After that, the process was not found anymore in high-draining apps, and battery life was a little better (again, no values here, I'll update in a few days after I run the tests again and double-check everything).

Can't say much about Google location, but I'd say most requests were not executed.

Whats happening when 3G is OFF and Wi-Fi is ON

Wi-Fi at work did not cause any interesting drain. The phone sat there and was connected all day-long. There were probably a few Google requests to determine its location, with some nlpwakelock, but not really interesting.

What was really interesting was the behaviour outside my workplce (e.g. on the street). I have in my "known networks" some wi-fi hotspots (FreeWifi) that are enabled with my DSL provider: they provide me with codes from my contract that I can use in the street if any other of their customer has a wi-fi enabled on their modem (their is a dedicated SSID broadcasted from their modem). The phone connected automatically whenever it detected this SSID (which was... really often), but the captive portal (to enter credentials) was not filled, because the phone was in my pocket. This caused HUGE wakelocks and drained the battery incredibly fast. I'm talking about draining 50% in an hour or so. I could even feel the phone warming up in my pocket.

So, conclusion here: I think Wi-Fi could be a major cause of battery drain if you have some fav SSID that require credentials through a captive portal.

I'll update in a few days if I find anything else, and to add values to what i've stated here.

Hope that helps!