[Galaxy Note 3 General] symobay:
i would like to share my testing results again, as now i'm happy with my battery life, after i had a lot of problems with it. This time along with some screenshots, as a proof and for a better understanding. I know it's kinda obvious, but people need to understand that there are 2 main reasons for fast battery drain:

bad phone radio signal AND/OR wakelocks AND/OR apps draining your battery.

in my case i was able to get rid of almost all wakelocks and energy-sucking apps. (search for wakelock guides in the forum)

Concerning bad GSM signal, there is not much you can do about it. So in my testing environment (located in an area with almost NO GSM signal) i've putted my note3 in flight mode, so that the phone doesn't constantly search for signal - along with wifi connected all the time (internet) and Bluetooth connetced to my Galaxy Gear ALL THE TIME. I did some gaming, listened to poweramp (mainly Lossless music), websurfing, a lot of whatsapp texting, youtube, mailing, and i've watched two whole 1080p movies in mPlayer Pro. Gsm was ON as well - twice for an hour each, when i left my house and moved to a location with good signal. during this two periods i was connected to the internet over 3g, and the drain was higher, but not that much, because the signal was quite good.

My setup/system:

- Galaxy note 3 n9005 (with stock rom i got 4hours of screentime)

- did a TOTAL wipe (system, dalvik, cache, sdcards)

- installed crash rom 4.3 mk2 (thanks crash)

- nova launcher, static background

- froze Apps with Titanium Backup: HP Print manager, Touchwiz ! (dont freeze TW if you dont use an alternative launcher like nova!!)

- Greenified: amazon kindle, android weather, celeb poker, chaton, some other stuff which was suspect to me and which caused some wakelocks

- some bloatware uninstalled (google play music and samsung Multimedia apps drained MUCH battery!! GPM drove me nuts anyway, with a lot of unexplained data-traffic, wakelocks, hickups during playback and so on...)

- turned of media scanning with "rescan media" from playstore (which is the cause for drain very often! I just do it manually if i add mp3/photos/videos)

- gps always OFF

- Wifi always ON and connected to the internet

- 2 hours of 3g connection

- light manager (for LED notification) in normal mode (no wakelocks)

- Google sync (pim) always on, mail fetch every 30mins

- gestures and stuff like that OFF

- galaxy gear always connected via Bluetooth

- brightness always at 45% !!

As you can see in my screenshots: i had 10 hours of screentime, and 22 of standby. It was even hard work to drain the battery! had that damn thing in front of my eyes the whole day until I finally was able to reach it's limits ;). The actual drain was around 0,75%/hour in standby overnight (combination of deep sleep and some cpu wakes) and around 9,5%/hour during use with the display ON. That`s pretty good I think.

So once the problem of powersucking apps and wakelocks is solved, the only thing which drains your batt. is when the note is SEARCHING signal. As soon the 2/3/4G signal is stable (even if its poor) the drain is obviously higher than in flight mode, but not much higher.

however, if i leave gsm ON, in the same location with poor to no coverage, during the whole 22 hours of standby/usage, and the phone constantly looking for signal without finding it, my screentime drops to 5-6hours.

recap:

case1: constellation as described above, no gsm signal, FLIGHTMODE, wifi always connected at home: 10 hours of screentime

case2: constellation as described above, no gsm signal, GSM ON (seraching), wifi always connected at home: 5.5 hours of screentime

case3: constellation as described above, mediocre/good gsm signal, connected to 3g : 7-8 hours of screentime

If you dont have signal, turn that thing into flightmode, as if there is no signal, it will not find any!

With this good results, i think i'm going to add a battery pack (ANKER 6400mah), so that just in case, when i'm in an area with no/poor GSM, i can achieve AT LEAST the same battery life of case 1 or even DOUBLE case 3, in areas with good 3g coverage

Use betterBatteryStats, CpuSpy and GSAM for your testing and wakelock hunting! Another indication, beside the testing apps, that some bb (background bastard ;) ) is sucking your energy, is that the Note 3 gets warm/hot near the camera very quickly, as soon something like google play or google services or mediascan is acting in the background. Even the playback of a fullhd movie at full brightness doesnt generate nearly that amount of heat.

This is just my experience and these are my tests after a long period of researchs. i'm happy if someone wants to add or correct someting. If you follow the same steps i'm sure you can achieve the same results. A galaxy note 3 with 4hours of screentime is not fun at all ...