[AT&T Samsung Galaxy S 4 General] nacos:
Please take this as (shared) information merely meant to make one think about & eventually consider someone else’s experience, rather than opinionated directions – which is NOT. I, myself see all this as a flexible, changeable, never ending process where further optimizations are definitely probable and possible. While I am definitely willing to share more details if someone’s interested, I will not respond to challenges or confrontations.

On some other thread someone suggested that without a screenshot it doesn't exist, so here you have the proving screenshots. During the first part of the day I've had a light/medium usage (receiving & sending about 10 emails, light online browsing, reading a couple of articles offline, etc). The vertical drop represents a reboot after generating a nandroid backup in TWRP and then the second part of the day was sort of medium/heavy usage with more time online and significant continuous screen-on time. (no 2D/3D games) I went to bed at 11:30PM with still 48% of battery left.

SPECIFIC environment and running parameters:

-	Stock JB 4.2.2, rooted, SGH-I337M (Canadian)

-	Lots of manually uninstalled/frozen apps/processes (through TB) – details available upon request.

-	Under Mobile Networks I force WCDMA only (unless I’m out, downloading larger files - case in which I temporarily switch to WCDMA/LTE/GSM). Reasoning: Despite later networks optimizations, LTE is still a power hog and since it’s only used for data transfer (no voice over LTE yet – called VoLTE), no point in keeping it On permanently especially when 4G (HSDPA) can render up to 15-18Mb/s.

-	WiFi On permanently (unless I’m away from “Home” for days - or longer - case in which I eventually consider manually toggling the WiFi). Reasoning: With the idea of automatically turning OFF the WiFi service when not connected and then turning it back ON when close to “Home” or “Work”, I have extensively tested various location based optimizations/monitoring methods (Tasker, Llama, Easy Profiles, Locale). So, it became clear that even when the location was monitored ONLY based on cell networks (by far the most power efficient method), the background monitoring process took (significantly) more power than the WiFi (dormant) services – especially since the recent Google’s API implementation of fused location services (go figure!!!). In other words it’s more power efficient to just leave WiFi services On when going out and about and then coming back to a “Home”/”Work” location where WiFi connection is used – then to use a background location monitoring service to toggle WiFi service On/Off.

-	Sync OFF (Reasoning: I simply don’t need it – your case may be different here, no arguments).

-	Location services OFF (Reasoning: I use Tasker to automatically turn the GPS On when certain apps are in the foreground and then automatically turn it back Off when the app is closed (no longer in the foreground)). This way I have 100% control over both, determining/monitoring exact location and power consumption.

-	Auto Start Manager (from ROM Toolbox Pro) to control the receivers/intents that load (or not) at boot. Reasoning: This method can be used in conjunction with (or instead of) freezing apps in Tasker since some apps may act funny after being frozen/unfrozen (i.e. If TalkBack is once frozen, then you’d most likely get the voice talking back to you (in some native apps) even when TalkBack gets restored to its original state and/or everything else is off, including all the dependent services – quite annoying. Same goes for “Software Update”. I’d rather disable the intent that activates the service at boot (in ROMToolbox), than freeze the service/app (in Tasker) because freezing may render the process unusable even after being restored/unfrozen. There are lots of possibilities here but this takes patience and trial & error.

-	Tasker is probably the only one app that makes me never leave Android environment. I use it heavily and the possibilities for optimizations (and amazement) are truly endless. When I mention Time/Location/Position/Variables/Apps optimizations/Sensor-based actions I merely scratch the surface. It takes a little bit of time and dedication to learn the ropes but it’s definitely worth the effort.

-	Facebook (Notifications On + auto sync every 1 hr), Google+ (Manual sync - since Sync is Off)

-	Aqua Mail Pro (all other email clients like Gmail or stock Email are frozen or uninstalled)

-	Boat Browser Pro (all other Internet browsers are frozen or uninstalled)

-	Screebl Pro (keep screen on) – rather than Samsung’s Smart Stay (a much better/efficient solution - although it seems to no longer be supported)

-	I mostly use the screen on Auto-Brightness but occasionally, in low light conditions (night/indoors) I use LMT Gestures/Tasker with 4 brightness presets (double swipe Up/Down/Right/Left – works wonder, even over a locked screen!!!)

-	RoboForm with a decent internal browser and an excellent security, solves the ordeal of remembering (or carrying them insecurely) lots and lots of login/passwords. Just to give you some food for thoughts, I often do online banking transactions on the phone – but only using RoboForm’s internal, secure browser.

I found the S4 much better optimized than any other phone I've had so far, in terms of power consumption when idle (screen off), however the SCREEN and the MEDIA SCANNER (running after every reboot) are the two major (I mean major) consumers that, despite careful optimizations, are still taking most of the battery – and there is not much we can do about it. :)