Database Develop

Does kernel affect battery?

hi guys im running firebird rom and my battery life sucks really bad. i take it out of charge at 10am and it dies around 4.30pm so does kernel makes battery life bad?
my kernel says : 2.6.32.9 [email protected] #28
please share

Depends. Some kernels are overclocked and will use more battery. Some are poorly put together and will use more battery. Some may not work well with one ROM, but great with another. Not knowing what you do with your phone it is hard to point a finger at the kernel. Poor reception, lots of wifi on time, lots of screen on time, GPS use, push e-mail...lots of things take battery. You need to see what it is you're using and whether that and not the kernel is your issue.

Short answer is yes, kernel affects the battery. All you can do is try a few different ones and see which is best for your usage.

im on messenger services and about 40-50 text and 3 mins of calls and my 3g on and brightness all the way down. no gps no bluetooth or wifi. i use the phone pretty much straight from 10am with maybe 2 mins here and there screen off

sofia-captivate said:
im on messenger services and about 40-50 text and 3 mins of calls and my 3g on and brightness all the way down. no gps no bluetooth or wifi. i use the phone pretty much straight from 10am with maybe 2 mins here and there screen off
Click to expand...
Click to collapse
Well, what more do you want? With that kind of usage I doubt you can do much better with any ROM.

that kinda sux but if the screen is really on that much it is normal, i dont think any rom has been tested to surpass 6 hours screen on time.
one good rom was andromda with which i had a hard time running my battery down in a single day, usually went 2 without a problem and i do a lot of texting. also an old version of perception built off a bell vibrant i9000m rom was outstanding.
kernels affect battery life but clock speed on the cpu has less to do with it than many people think, the assumption is faster cpu speeds means more power drawn but the cpu is governed, the governor setting have a lot to do with it. think about it, is it better for the cpu to take 4 seconds on an operation @ 600mhz or do the same operation in 2 seconds @1.2ghz? depends on alot of things reallly but thew difference is alot smaller than people expect. there is also kernelhz which i dont know much about but reportedly if set down to 100 to match another frequency(cant remember off the top of my head) will increase battery life.
the kernel controls many aspects of the system but i haven't seen a kernel that has had a huge increase in battery life given the same rom since the 2.1 days. and even then the battery life wasnt as good as a couple of the 2.2 roms. it seems to me that the rom has more to do with battery life. some vibrant ports have severe battery drain issues on the captivate. some i9000 ports have amazing batery life but most are about the same as stock to slightly better.
if battery life is a problem first you want to see if any processes keep the phone from sleeping. figure out what apps show in the running process list and try killing them, if they don't die/they start back up then freeze them in titanium backup and see if anything makes a difference. careful freezing system processes, some are not detrimental, most are.
other tips are to try apps that manage 3g like juice defender. and use wifi when you can 3g is a bigger battery hog than wifi. also there may be a way to set the phone to default to edge instead of 3g but i think it varies with the build of the rom, you will have to research that one.
other things to look at is weather you sync to google, facebook, twitter ect. those feeds widgets can eat battery as well as the sync process. weather widgets like beautiful widgets seem to have an effect on some of the vibrant ports i used but not as noticable on other roms.

Yikes...that is some awful battery life. I'm surprised because speedmod (and it's variants) is pretty well accepted as being the best kernel for battery life. There are many threads around here for improving battery life. I have personally found that my biggest battery user was constantly checking how much battery I had used.

If you are barely turning your screen off that is good battery life. You will never make it much past 5hrs screen time. Where people get like 40hrs on a charge is when the phone its not actually used, and their set up has good standby performance
CM7

When I used assonance I would get three days of battery life.
Sent using smoke signals.

As some have said screen time is the single biggest battery user. My phone will last for about 3 hours of screen on time. So I could have my phone die in 3 hours, or 2 days, it all depends on how often I'm turning that screen on.

Connor1 said:
When I used assonance I would get three days of battery life.
Sent using smoke signals.
Click to expand...
Click to collapse
Screenshot of total up time and screen-on time?
Sent from my SAMSUNG-SGH-I897 using XDA App

sf1120 said:
Screenshot of total up time and screen-on time?
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
Here's a screenshot of my normal battery usage when I had a captivate, using Precision 3.5.
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wifi uses less power than 3g, my phone only drops 5% over an 8 hour sleep with wifi on the whole time.

ryude said:
Here's a screenshot of my normal battery usage when I had a captivate, using Precision 3.5.
Click to expand...
Click to collapse
Nice ryude.Mine's not as good,but close.So it just proved to me that when ppl say they got 3 days out of a single charge,they're actually not using their phone all.I'm not trying to flame anyone,just my honest opinion.I bought my phone so I can use it,not leave it on a desk.Here's mine.
Forgot:Running Phoenix Ultimate..

sf1120 said:
Nice ryude.Mine's not as good,but close.So it just proved to me that when ppl say they got 3 days out of a single charge,they're actually not using their phone all.I'm not trying to flame anyone,just my honest opinion.I bought my phone so I can use it,not leave it on a desk.Here's mine.
Forgot:Running Phoenix Ultimate..
Click to expand...
Click to collapse
Yeah, I would say if you're not getting at least 3 hours screen time then you aren't using your phone that much.

Trusselo said:
wifi uses less power than 3g, my phone only drops 5% over an 8 hour sleep with wifi on the whole time.
Click to expand...
Click to collapse
Not if you're in a bad reception area.
This is what I average on Andromeda. Some wifi, some GPS tracking, lots of music streaming via BT.

Of course, nearly everything comes into play. Modem, ROM, use, etc.

Here's my battery life from yesterday..

sf1120 said:
Here's my battery life from yesterday..
Click to expand...
Click to collapse
What ROM are you using?

Miami_Son said:
What ROM are you using?
Click to expand...
Click to collapse
Phoenix Ultimate,jk4 and speedmod.Basically whatever adam threw together.
Sent from my SAMSUNG-SGH-I897 using XDA App

IS this for real? 13 hour screen on time / battery life for Nexus 7! +USB OTG Flash!

I ran a battery rundown test on the Nexus 7.
Notifications off
Wifi off
Bluetooth off
GPS off
Airplane mode on (I know redundant but wth)
Screen brightness auto
Reset Battery Stats in Recovery
Nav bar turned off
Video zoomed to make it fill up the entire screen. (Dice player does this nicely, just pinch & zoom in 5% increments, this video was set to 150%)
I used Dice Player to play that new Batman movie over and over again. It's a h.264 encoded movie @ 720p in MKV container (which I'm loving this container, you can embed subtitles! but I don't think the container matters cuz that's a demux function, not decode function, more important prolly is to use a h.264 profile that's mobile SOC-friendly). It was playing in [HW] accelerated mode.
We got a SCREEN ON time of almost 13 hours!! This lil guy will easily last long enough for most airplane flights. I was a bit worried honestly, cuz you know, Android has a bad rep for battery life. But, I don't think that's the case anymore.
Android ver/ROM/kernel nfo in screenshots.
BTW, SCREEN ON time is different than "battery life" time, because it records the time the device spent with the screen on. Total battery life includes sleep mode, this can sleep for days, maybe a week or two or more, never really tested it.
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It would be cool so see others reproduce similar results!
UPDATE: Nexus 7 Screen On Time Battery Life Rundown USB OTG Flash Storage Memory Stick Test

thanks for defining what screen on time is. we would all be lost without you.

Thanks for the test. I too have noticed outstanding battery life. I just flew from Hawaii to Michigan and watched movies for over 9 hours on the flight. I still had over 30% when I arrived. This device definitely lasts all day for me!
sent from my perfect 32GB Nexus 7

i think i will downgrade to 4.1.2. nice battery stats... mine are horrible

cnstarz said:
thanks for defining what screen on time is. we would all be lost without you.
Click to expand...
Click to collapse
Geeze, don't get your panties in a bunch. Don't assume all the readers here are veteran Android users.

RobYyY said:
i think i will downgrade to 4.1.2. nice battery stats... mine are horrible
Click to expand...
Click to collapse
Only problem is that stupid MEDIA SERVER process eats up a lot of juice in both 4.2.x & 4.1.x
I've googled numerous threads about users complaining about how that drains your battery.
Google really needs to fix that.
We could probably push 15hrs screen on time if they fixed it.

these stats are great.thanks for sharing.
unfortunately this is only for playing a movie without thouching the screen.using the touchscreen has a big impact on the battery life.

peddarson said:
these stats are great.thanks for sharing.
unfortunately this is only for playing a movie without thouching the screen.using the touchscreen has a big impact on the battery life.
Click to expand...
Click to collapse
that's very true. I think this is a good example of what the battery is capable of under the perfect conditions. Every little extra you add to it will cause extra drainage however tweaks here and there in the right areas based on the significant sources of drain can slow drainage by alot. For me hspa+ is my single biggest source of drain but I use it as my phone also so all I can really do is undervolt turn wifi/blue tooth off when I don't need it and it gets me through the day very well. Everybodys experience will be different though because of all the different configurations but all in all it should last 90% of users through the full day at least.
Sent from my KFTT using xda premium

how long are you able to play games/?..

RobYyY said:
how long are you able to play games/?..
Click to expand...
Click to collapse
I personally do about 3 hours worth of gaming in a typical day and get 7 hours total screen time. For me worst case scenerio is about 5½ hours if I do nothing but play heavy games like dead trigger and NFS MW.
Sent from my Nexus 7 using xda premium

looking at the battery graph and stats, it looks like the device was left alone mostly, with the screen on. you see how even the slope down is, it lost battery at an even/steady rate. and the screen wasnt turned off the whole 13 hours. this isnt realistic use.

I've been happy with battery life, havent' done any testing but seems CM 10 works well.

95Z28 said:
I personally do about 3 hours worth of gaming in a typical day and get 7 hours total screen time. For me worst case scenerio is about 5½ hours if I do nothing but play heavy games like dead trigger and NFS MW.
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
wow.. if i play subway surfers my battery dies in 3 hours.. I will try few more days to improve it(different roms, kernels). I hope i will not be forced to send it to warranty cause it takes too long..

Neo3D said:
Only problem is that stupid MEDIA SERVER process eats up a lot of juice in both 4.2.x & 4.1.x
I've googled numerous threads about users complaining about how that drains your battery.
Google really needs to fix that.
We could probably push 15hrs screen on time if they fixed it.
Click to expand...
Click to collapse
Put .nomedia fike in every possible folder

Hey guys Use tirnity kernal for 4.2 the battery life is awesome mine stays almost a week with standby .. i will let u know with wifi,gps, bluetooth on ...

RobYyY said:
how long are you able to play games/?..
Click to expand...
Click to collapse
That's really going to depend on the game right? I mean Draw Something! is probably going to last a lot longer than Modern Combat 2.

simms22 said:
looking at the battery graph and stats, it looks like the device was left alone mostly, with the screen on. you see how even the slope down is, it lost battery at an even/steady rate. and the screen wasnt turned off the whole 13 hours. this isnt realistic use.
Click to expand...
Click to collapse
Yep, exactly, that's what you do when you watch a movie..you just turn it on and leave it there.
I'm about to go on an international flight, so it is realistic. I plan to just watch movies back to back most of the time. If someone reads a book on this, I don't see much variance either as long as the variables are kept the same (auto brightness, airplane mode, etc).
Besides, does waking up from and putting the Nexus 7 into STANDBY make it somehow spike in its power usage (like light bulbs/cars/etc)? Is there a way to measure that?
The next test I'm going to run is to see how long it lasts playing a movie file from an USB Flash memory stick using a USB OTG cable.

Neo3D said:
Yep, exactly, that's what you do when you watch a movie..you just turn it on and leave it there.
I'm about to go on an international flight, so it is realistic. I plan to just watch movies back to back most of the time. If someone reads a book on this, I don't see much variance either as long as the variables are kept the same (auto brightness, airplane mode, etc).
Besides, does waking up from and putting the Nexus 7 into STANDBY make it somehow spike in its power usage (like light bulbs/cars/etc)? Is there a way to measure that?
The next test I'm going to run is to see how long it lasts playing a movie file from an USB Flash memory stick using a USB OTG cable.
Click to expand...
Click to collapse
yea, putting the device to sleep and waking it up will show plateaus(flatlines) and drops.

simms22 said:
yea, putting the device to sleep and waking it up will show plateaus(flatlines) and drops.
Click to expand...
Click to collapse
But it shouldn't affect its screen on time?

Neo3D said:
But it shouldn't affect its screen on time?
Click to expand...
Click to collapse
it will. because even if the screen isnt on, the device is using some power. since its using some power, it leaves less for the screen to use. so, less overall screen time the more the device is not used

Possible battery issue

I still need to download GSAM, but I've noticed this over the last couple days. I also have the Gear 2 Neo but I don't think it's causing the battery drain...
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A lot of different variables to consider here...same old battery life complaint. Answer, it depends on the operator.
Sent from my SAMSUNG-SM-G900A using xda app-developers app

Same
I have the same issue here. The phone had about 30% battery before I went to sleep... Woke up with 1%.
40% is used by Android OS
20% by the Android system
7% by the Screen

The last 2 days mine has been decent, today has been terrible with really high Android System usage.

nizbot said:
A lot of different variables to consider here...same old battery life complaint. Answer, it depends on the operator.
View attachment 2688293
View attachment 2688296
Sent from my SAMSUNG-SM-G900A using xda app-developers app
Click to expand...
Click to collapse
I should have been more specific, but this is with what I would call "general use". No video watching, gaming, streaming, which, IMO are the real battery killers. It doesn't seem right that you would lose 33% of the battery in that amount of time from a full overnight charge.

diehardbattery said:
I should have been more specific, but this is with what I would call "general use". No video watching, gaming, streaming, which, IMO are the real battery killers. It doesn't seem right that you would lose 33% of the battery in that amount of time from a full overnight charge.
Click to expand...
Click to collapse
All true, but was your bluetooth connected? Wifi signal, cell signal, all the regular shizzle... How does it look for 4 hours of general use with the Gear disconnected?
I'm not asking to be a ****, I'm actually very curious cause I'm looking at getting one
-n

Android System is definitely higher than on my S4, but I don't think it's actually drain, something has to use that 24 of the 100%. I'm getting very good life with about 6 hours screen-on.
That said, it would be good to know exactly what's behind it being so high.
I've also noticed more wakeclocks than normal. I thought it was Google Now but I disabled background data for it and it didn't seem to change anything.
We've gotta get root so we can really fine tune things.
Sent from my SAMSUNG-SM-G900A using XDA Premium HD app

diehardbattery said:
I still need to download GSAM, but I've noticed this over the last couple days. I also have the Gear 2 Neo but I don't think it's causing the battery drain...
Click to expand...
Click to collapse
Strange i think its something youre doing. I power use all day from 530 am to 10 pm and i still have 25% before bed

I'm getting incredible battery life out of my S5 so far. Yesterday I checked last night and was at 33%, that's with being off the charger almost 14 hours (like 14hr 51min something like that), on screen time of 4 hours browsing with multiple tabs etc (no games), email, about 30 minutes of phone calls, couple text, and streaming music at the gym for an hour. Today I'm at 72% @ 8hr 31min off charger with streaming music about 2 hours (truck and gym), 45min on screen time, only a couple quick calls. I have GPS etc on, only thing I changed and I always do with Android, is set wifi to stay on in sleep only when plugged in, not sure if they fixed wifi bug Android has always had causing tons of wakelocks in sleep mode.

nbrent1007 said:
Strange i think its something youre doing. I power use all day from 530 am to 10 pm and i still have 25% before bed
Click to expand...
Click to collapse
I'm not sure what I could be doing that drains the battery that much, but I'm not ruling out the watch either... Besides if it was something I'm doing, wouldn't that reflect in the battery usage?

diehardbattery said:
I'm not sure what I could be doing that drains the battery that much, but I'm not ruling out the watch either... Besides if it was something I'm doing, wouldn't that reflect in the battery usage?
Click to expand...
Click to collapse
Download better battery stats to see where itrs coming from

nbrent1007 said:
Download better battery stats to see where itrs coming from
Click to expand...
Click to collapse
I've got gsam... or would better battery stats be... better?

nizbot said:
All true, but was your bluetooth connected? Wifi signal, cell signal, all the regular shizzle... How does it look for 4 hours of general use with the Gear disconnected?
I'm not asking to be a ****, I'm actually very curious cause I'm looking at getting one
-n
Click to expand...
Click to collapse
Well, the gear 2 is connected all the time... But I had the first gear and that wasn't an issue. I'll have to see in the morning if it makes a difference. I'm on wifi 99% of the time. I have a Tab Pro 12.2 that's on wifi all the time and that thing is only down to like.. 70% after 2 days of light usage with a bluetooth keyboard connected. The battery seemed great a couple days ago and I haven't changed anything... I've actually done more.. used Google Navigation mostly...

I've had gsam on for the last 2 hours or so... am I going crazy or is this normal?

diehardbattery said:
I've had gsam on for the last 2 hours or so... am I going crazy or is this normal?
Click to expand...
Click to collapse
Give it a charge cycle at least.
However, I just noticed something that is really REAALLY messing with my head. I was just looking at my battery stats again and my phone is telling me it's been on battery for 4 hours 51m. It's 4pm here and i've been unplugged since 6am this morning. My earlier post show's 5 hours even! What gives??? The phone has rebooted once today manually. I just restarted again and can confirm that GSAM resets to zero (whatever), but the issue that's really messing with me is that the system battery and uptime shows 4 hours. WTF?! I'm seriously confused.
Something is fishy here...

I'm gonna let the battery drain completely this time...

Well I've had awesome life since I got the phone last Thursday, like I posted on the 1st page, except for last night. Did nothing different from before, no new apps or anything, I disabled sammy and at&t stuff earlier but the phone was fine after that. I went to bed and it was at 34% and woke up 7-8 hours later to a dead phone. No clue what could have caused that as the past week drain even in standby mode was phenomenal, have to install BBS.
Other night I went to bed and it only drained like 5% in the same time

I fully discharged the battery and it seems better now. But when I plugged back in, I noticed that the app called IM+ was running in the background in push mode... I'm not sure if that was causing the problem but it is much better now over the last couple of days

I had a horrible wakelock today, Directv geniego was running for 6.5 hours. Battery life has been great up till today.
Sent from my SAMSUNG-SM-G900A using Tapatalk

Moderator Comment: Thread cleaned of inappropriate comments. Carry on

Help re battery drainage and synapse optimisation

So I'm fairly new to the Android's scene, I've come from a jailbroken iPhone straight to the nexus 6 after doing a load of research on which phone I should get.
The iPhone is so much easier to work with, in it's jailbroken and default state. I've had my nexus for about 3 months now and only now feel alright using the words ROMs, kernals and flashing.
I want to optimise my nexus for maximum battery life, I know I'll have to comprise with animations and processing power etc.
Here are a few sc of how my set up is currently
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I flashed my current ROM and kernal last night and did not charge over night so I could just see how much drainage there is when its on standby. This morning I charged it up to about 81% and used the phone normally and I've noticed my battery is actually depleting really quickly. Especially when you take into account I had my setting to power saver, and I was using pixel off battery saver and a kernal made for huge battery life.
I know the issue is with wakelock? But I can't find any help and what I can find is far too complicated to follow.
Also, synapse. That thing is a nightmare for a noob like me. If anyone could link me to a thread or website that explains each feature or somewhere where someone has shared their setting for getting the most battery life, I will be very grateful.
Thank you in advance
Sent from my Nexus 6 using XDA Free mobile app

@icameforthehax Thank you for posting the perfect example of how to ask a question! You've provided all of the proper information, in order for someone who can help, to do so. I'm sorry I can't answer your specific questions but I had to comment on the quality of your post. Well done and welcome to Android! :victory:
I'm sure someone with more expert advice than I can provide you on this topic, will help you shortly. :good:
I will suggest this though, look into a third party battery stats/wakelock detector app to more specifically isolate any wakelocks or battery drain. Also, greenify is an excellent option for root access.

well, your play store and android os is way to high on battery percent used! screen should be the #1 battery drainer(or close). other things shouldnt be that far above the percent for screen use.

Evolution_Freak said:
@icameforthehax Thank you for posting the perfect example of how to ask a question! You've provided all of the proper information, in order for someone who can help, to do so. I'm sorry I can't answer your specific questions but I had to comment on the quality of your post. Well done and welcome to Android! :victory:
I'm sure someone with more expert advice than I can provide you on this topic, will help you shortly. :good:
I will suggest this though, look into a third party battery stats/wakelock detector app to more specifically isolate any wakelocks or battery drain. Also, greenify is an excellent option for root access.
Click to expand...
Click to collapse
Thank you for your kind words *tips fedora*
simms22 said:
well, your play store and android os is way to high on battery percent used! screen should be the #1 battery drainer(or close). other things shouldnt be that far above the percent for screen use.
Click to expand...
Click to collapse
Yes, the fact that my screen wasn't the no.1 drainer is why I was concerned enough to start thus thread. Any recommendations as to which app(s) I should use?
Sent from my Nexus 6 using XDA Free mobile app

icameforthehax said:
Thank you for your kind words *tips fedora*
Yes, the fact that my screen wasn't the no.1 drainer is why I was concerned enough to start thus thread. Any recommendations as to which app(s) I should use?
Sent from my Nexus 6 using XDA Free mobile app
Click to expand...
Click to collapse
android os i wont be too concerned about, since that changes depending on how you use the phone, but the play store.. were you restpring a bunch of apps or something? anyways, recharge your phone fully, then use it like you normally would, then past the battery results here, after a full use of the battery, and ill look at it again. next time past not only the main battery page, but if you press on the chart itll give you more info, paste that as well so we can see your signal, wifi, and if the phone is sleeping.

icameforthehax said:
Thank you for your kind words *tips fedora*
Yes, the fact that my screen wasn't the no.1 drainer is why I was concerned enough to start thus thread. Any recommendations as to which app(s) I should use?
Sent from my Nexus 6 using XDA Free mobile app
Click to expand...
Click to collapse
Greenify:
https://play.google.com/store/apps/details?id=com.oasisfeng.greenify
As for battery monitor, it will be more based on your personal preference but I have used this:
https://play.google.com/store/apps/details?id=com.gsamlabs.bbm

simms22 said:
android os i wont be too concerned about, since that changes depending on how you use the phone, but the play store.. were you restpring a bunch of apps or something? anyways, recharge your phone fully, then use it like you normally would, then past the battery results here, after a full use of the battery, and ill look at it again. next time past not only the main battery page, but if you press on the chart itll give you more info, paste that as well so we can see your signal, wifi, and if the phone is sleeping.
Click to expand...
Click to collapse
I downloaded a load of apps because I did a clean flash of benzo. I'm currently charging my phone and will return with more screen captures as requested
Sent from my Nexus 6 using XDA Free mobile app

icameforthehax said:
I downloaded a load of apps because I did a clean flash of benzo. I'm currently charging my phone and will return with more screen captures as requested
Sent from my Nexus 6 using XDA Free mobile app
Click to expand...
Click to collapse
if you downloaded a bunch of apps, thay would explain why. anyways, the first 2 battery cycles after flashing a rom will be a little lower than normal. after, battery should be better.

simms22 said:
if you downloaded a bunch of apps, thay would explain why. anyways, the first 2 battery cycles after flashing a rom will be a little lower than normal. after, battery should be better.
Click to expand...
Click to collapse
Here's screenshots from today, (I changed to Franco kernal)
I'm sure I had 4-5 sot on stock everything. Slightly disappointed
Sent from my Nexus 6 using XDA Free mobile app

icameforthehax said:
Here's screenshots from today, (I changed to Franco kernal)
I'm sure I had 4-5 sot on stock everything. Slightly disappointed
View attachment 3284811View attachment 3284812View attachment 3284814
Sent from my Nexus 6 using XDA Free mobile app
Click to expand...
Click to collapse
again, you just flashed franco kernel, so youll have to give it a battery cycle or two to regulate, then you can start judging battery life. but your device is goung into deep sleep, so that's good. also, do you always keep wifi on? if you keep it on, but dont use it it'll drain battery. also, what do you have your brightness set to?

simms22 said:
again, you just flashed franco kernel, so youll have to give it a battery cycle or two to regulate, then you can start judging battery life. but your device is goung into deep sleep, so that's good. also, do you always keep wifi on? if you keep it on, but dont use it it'll drain battery. also, what do you have your brightness set to?
Click to expand...
Click to collapse
OK, thank you. The issue is me changing kernals and ROMs etc. I'll cycle my battery 2 time as you've said before I start to judge battery life ty.
Yes I keep WiFi on and use wifi. My brightness is dragged right down with adaptive off, I then change it to 50-70 if I'm outside.
Thank you very much for your help though
Sent from my Nexus 6 using XDA Free mobile app

Synapse is confusing to anyone who doesn't know what they are messing with...try FauxClock or Trickster Mod...much simpler and you won't have to worry about changing things by accident by swiping to the next page as you would with Synapse.

simms22 said:
if you downloaded a bunch of apps, thay would explain why. anyways, the first 2 battery cycles after flashing a rom will be a little lower than normal. after, battery should be better.
Click to expand...
Click to collapse
Simms is absolutely correct - after a rom or kernel flash you need to give the phone a few days to build up its cache etc...only after that can you properly judge battery life and performance.

icameforthehax said:
OK, thank you. The issue is me changing kernals and ROMs etc. I'll cycle my battery 2 time as you've said before I start to judge battery life ty.
Yes I keep WiFi on and use wifi. My brightness is dragged right down with adaptive off, I then change it to 50-70 if I'm outside.
Thank you very much for your help though
Sent from my Nexus 6 using XDA Free mobile app
Click to expand...
Click to collapse
screen brightness is a MAJOR influence in battery life. i generally keep my brightness down below 15%. if i raise my brightness to 30-40%, then ill see 1 hour less screen on time. normally, ill see anywhere from 5-6.5h sot. another major influence is the quality of your phone/data signal. some people, no matter what they do, will never have good/great battery life, just because their signal quality is lousy.

Somewhat off topic, but Better Battery Stats is a great app for getting a much more in depth idea of battery life. It'll also give you all the wakelocks, which can be handy if you looking to do more in depth troubleshooting.

Great Battery life with everything enabled.

It's been a week since I turned on most features on my S6. Bluetooth all day. GPS enabled. Auto brightness. Apps syncing every hour including weather widget with location on. Ok Google on system wide and a lot more on too. I don't focus on SOT too much because I'm not on my phone constantly. I focus on overall battery life.
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With only 3 hours screen on time of course overall battery life will be decent. I typically lose less than .25% an hour when my phone isn't touched. Slept 10 hours Saturday night and only lost 2%.

when you buy this phone you have to rooted and flash a kernel and a custom rom thats it!! for me im running vindicator r3 and xtretos lite and everything is work! is a huge difference from stock! for me this phone is perfect now. i multitask i do split screen everything you can do. i can't complain
Sent from my SM-G920T using XDA Free mobile app

mikeyinid said:
With only 3 hours screen on time of course overall battery life will be decent. I typically lose less than .25% an hour when my phone isn't touched. Slept 10 hours Saturday night and only lost 2%.
Click to expand...
Click to collapse
I understand that. My point is that I have most features on all the time that people usually turn off just to save battery.

!JORGE! said:
when you buy this phone you have to rooted and flash a kernel and a custom rom thats it!! for me im running vindicator r3 and xtretos lite and everything is work! is a huge difference from stock! for me this phone is perfect now. i multitask i do split screen everything you can do. i can't complain
Sent from my SM-G920T using XDA Free mobile app
Click to expand...
Click to collapse
Everything you mentioned works fine without doing all that complicated rooting and ROM flashing process, then having to back up all your apps and messages and wait like 20 minutes to get it all back on there.

megagodx said:
Everything you mentioned works fine without doing all that complicated rooting and ROM flashing process, then having to back up all your apps and messages and wait like 20 minutes to get it all back on there.
Click to expand...
Click to collapse
im just saying as a reference and with my own expirience i find a huge difference in between stock and rooted saying stock rom and stock kernel and my first reason of rooting is to get rid off all the bloat this phone come with! in stock rom without root everything is laggy!
Sent from my SM-G920T using XDA Free mobile app

mikeyinid said:
With only 3 hours screen on time of course overall battery life will be decent. I typically lose less than .25% an hour when my phone isn't touched. Slept 10 hours Saturday night and only lost 2%.
Click to expand...
Click to collapse
How do you do that?
Im on 5.1.1 running xtresto pure 2.0 and simplkernel and lose about 5% over night with only mobile data on
any tips?

FM5 said:
How do you do that?
Im on 5.1.1 running xtresto pure 2.0 and simplkernel and lose about 5% over night with only mobile data on
any tips?
Click to expand...
Click to collapse
Yeah get rid of snapchat and instagram. Are on top of your list. dont you see?
Sent from my SM-G920T

So far 15 hours since last full charge. Had the fun plugged in my car for a few minutes while I drove to Walmart and I have 30% battery life left.
Sent from my SM-G920T using XDA Free mobile app

ambervals6 said:
Yeah get rid of snapchat and instagram. Are on top of your list. dont you see?
Sent from my SM-G920T
Click to expand...
Click to collapse
ya i dont see myself using instagram and snapchat while im asleep (8am-4pm), and both are greenified. thanks for trying to help!

You could just buy an external battery pack case and never have to worry about battery life ever running out again within a 24 hour period.

I'm running stock rooted, I'm losing about 1% per hour while I'm sleeping. I'm hoping the battery is still settling in because I'm not able to get great SOT as of yet. I've had the phone less than a week, came from Verizon with the S6E. Would get about 4 hours SOT max there...
Sent from my SM-G920T using Tapatalk

My stock S6 will lose about 10-15% overnight when I'm sleeping, I usually end up turning on Battery Saver and enabling Airplane Mode and I still lose about 5-8%. I have to charge my phone a few times through out the day, I'm actually even happier with my JBL PowerUp speakers w/wireless charging, I have them at work and just set it on there when I'm at my desk so I can at least get more juice out of it.
I need to look in to flashing a custom ROM on this, I really don't care about tripping KNOX as Samsung Pay won't even be available for quite some time. Are there any other downsides to tripping KNOX? I know there are ways to get around it without tripping it, but I don't really know if I should care or not.

Turn off lte use only 3g-4g that will help with ur battery drain
Sent from my SM-G920T using XDA Premium 4 mobile app

Great battery life here with these tweaks:
1) I have a macro (Macrodroid app) which kills select background apps (excluding email, messaging, and such) when the screen goes off.
2) KTWeaker installed using the Asking Alexandra profile
3) Flyon Mods app is also installed and all tweaks are enabled
Under average use the phone can easily make it 24+ hours without a charge

cwhiatt said:
Great battery life here with these tweaks:
1) I have a macro (Macrodroid app) which kills select background apps (excluding email, messaging, and such) when the screen goes off.
2) KTWeaker installed using the Asking Alexandra profile
3) Flyon Mods app is also installed and all tweaks are enabled
Under average use the phone can easily make it 24+ hours without a charge
Click to expand...
Click to collapse
What is your Screen On Time? i got 3 hours and 20 minutes at 6% charge left With most services and bloat disabled using Titanium

Just checked GSam now. I've got an hour on you at 4 hours and 20 minutes screen on.

cwhiatt said:
Just checked GSam now. I've got an hour on you at 4 hours and 20 minutes screen on.
Click to expand...
Click to collapse
Link to the apps you used? and how do i get the alexandria profile?

Links to the apps I used? Not sure what you mean. I could probaly email you the asking alexandria profile but if you download the KTWeaker apk and launch the app you can download that or any other profiles that will facilitate the performance/battery maintenance you are after.
---------- Post added at 12:54 AM ---------- Previous post was at 12:49 AM ----------
You will likely need to be rooted for the apk file and possible the Fly on mod.
KTWeaker here > https://www.androidfilehost.com/?fid=23578570567713744
Fly on Mod here > http://forum.xda-developers.com/android/apps-games/app-fly-mod-app-alpha1-feel-smoothness-t3171503
Macrodroid can be downloaded from the Play Store