Database Users

[Q] Question about rooting my Note 3 for better battery life

I've had an AT&T Note 3 since January. The phone is great but since the update to 4.4.2 I have been experience horrendous battery life, to the point that I'm having to charge it throughout the day.
I work construction and use my phone for several hours per day, resulting in 2-3 hours of voice calls and 2-3 hours of screen time. My last Note 2 and the current Note 3 used to be able to handle my workload while being unplugged from 7AM to 10PM at night.
If I was to root my phone, could I gain back my battery life? I have never had the need for my phone to be anything other than stock but I am desperate at this point.
Thanks

Rooting your phone will not result in having better battery life. What you can do is detect apps that keep your phone awake. Another method is to flash a custom kernel with lower voltage or one on which you can undervolt yourself. Be aware that by rooting and/or flashing custom recoverys/kernels or firmwares you'll trigger the Knox counter. This will void your warranty. There is no way to revert it.
Please use the Q&A section next time you have a question. Hope I could help you a little.
Gesendet von meinem SM-N9005 mit Tapatalk

nitrous² said:
Rooting your phone will not result in having better battery life. What you can do is detect apps that keep your phone awake. Another method is to flash a custom kernel with lower voltage or one on which you can undervolt yourself. Be aware that by rooting and/or flashing custom recoverys/kernels or firmwares you'll trigger the Knox counter. This will void your warranty. There is no way to revert it.
Please use the Q&A section next time you have a question. Hope I could help you a little.
Gesendet von meinem SM-N9005 mit Tapatalk
Click to expand...
Click to collapse
I appreciate the reply. I was hoping that rooting would allow the phone to run off of custom firmware and not have the horrible battery drain many Note 3 users are experiencing after the 4.4.2 update.
I have installed GSam Battery Monitor for over a month and been monitoring it daily. I'm consistently seeing Android System and Kernel (Android OS) using 40% of my daily battery life and Media using another 15%-25%. Other than that I've been unable to determine much else. I do not play games or Facebook, I just talk and text all day.
Is the warranty on the phone one year? If so, I'm 2/3 through it and would be willing to void it for better battery life.
I have looked through all I could find before posting, but honestly am somewhat overwhelmed by all the information on XDA. This is magnified by the fact that there are many versions of the Note 3 and different carriers.
I have a N900A Note 3 and am looking to get my all day battery life back and appreciate the help.

cdogg44 said:
I appreciate the reply. I was hoping that rooting would allow the phone to run off of custom firmware and not have the horrible battery drain many Note 3 users are experiencing after the 4.4.2 update.
I have installed GSam Battery Monitor for over a month and been monitoring it daily. I'm consistently seeing Android System and Kernel (Android OS) using 40% of my daily battery life and Media using another 15%-25%. Other than that I've been unable to determine much else. I do not play games or Facebook, I just talk and text all day.
Is the warranty on the phone one year? If so, I'm 2/3 through it and would be willing to void it for better battery life.
I have looked through all I could find before posting, but honestly am somewhat overwhelmed by all the information on XDA. This is magnified by the fact that there are many versions of the Note 3 and different carriers.
I have a N900A Note 3 and am looking to get my all day battery life back and appreciate the help.
Click to expand...
Click to collapse
Don't worry, it's normal to suffer infoglut the first time looking through xda. You'll get used to it =)
So you have the AT&T version of the Note III aka hlteatt or SM-N900A. You're device has a Qualcomm chip built in like most of the Note III variants out there. There's also a Note III variant which has an Exynos chip built in but I think you won't confuse Exynos firmwares with those dedicated for Qualcomm variants. The ROM threads ususally have pretty good descriptions about that. AFAIK most custom ROMs are compatible with any Qualcomm variant. E.G. any AOSP/CM ROM for the Qualcomm Note III has a unified build carried by the name "hlte". Meaning, that as long as you don't flash an image meant for the Exynos variant, you should be good.
40% for Android-System and Kernel isn't normal at all. I also use GSam Battery Monitor. Android-System and Kernel only use about 19% of the battery on my phone. Something that helped me when I had the exact same issue was to switch locating method from high accuracy to power saving. You can find this setting by long-pressing the GPS icon in the notification drawer. The location settings menue will pop up. Under "Mode" you can change to "Power saving". I'd be happy if you could report if it did work for you.
You're welcome =) Just hit the thanks button.

If I may add my own comments here:
1. you should go to note 3 ATT forum and there find proper method to root your phone, we have towelroot program that can root phone very easily without breaking knox warranty, albeit I don't know if it works on your version, it worked perfectly on mine (t-mo)
2. While it is true that root by itself won't do anything about your battery usage, many programs that really help need root
For example greenify, titanium backup or android assistant require root to disable many useless (useless for you that is) programs that drain your battery
3. I totally disagree with Nitrous that GPS is the culprit for high battery usage. It is my experience that GPS all by itself does not work at all unless the location info is requested by some other programs. Google maps for example only run GPS when screen is on, when screen is off, GPS is off also. However some badly behaving programs can keep requesting location even in the middle of night, but IMO those programs are the problem, not GPS itself. I have GPS, BT and WiFi on 24/7 and with light use my phone could last 4-5 days. If GPS was draining battery as many people think, phone would never last that long.
What you should do is go to ATT forum and find towelroot method, root your phone and freeze, or disable apps you don't use. For example I don't use Bloomberg, Yahoo, Facebook, Hangouts, indexing etc (your list may be different, since different provider) so I have them frozen (won't start up) . If I ever change my mind, I can unfreeze them later.
You can also run programs to tell you which apps use most battery, or wake the phone from sleep and then decide if you need them or not.
BTW sometimes full reset and cache clear can fix some of the problems, so maybe that should be the first step.
Once you find which program /s cause problems your phone should last whole day. I could easily get 6 or more screen hours on my Note3, unless playing some intensive games, so should you and it just took couple hours to identify and disable all the bloat and there is a lot.
I also experienced increase in battery usage after updating to KK, but I have not found a time to look over the bloat and redo my program freezing efforts yet.

I know that GPS doesn't drain battery that much. But trust me, it is very likely to cause that type of behavior. I'm in this forums since a couple of years. In most cases, when Android-system and Kernel drain unusual amounts of battery it was location services that was causing it. But not because they were using GPS, but because they kept the device awake the whole time. And there you see my point of switching locating methods. In 90% of the scenarios where people described this kind of behavior of their devices, this solved the problem. But you're right in saying that it's not a permanent solution. I agree to your first two points.
Sent from my SM-N9005 using Tapatalk

nitrous² said:
I know that GPS doesn't drain battery that much. But trust me, it is very likely to cause that type of behavior. I'm in this forums since a couple of years. In most cases, when Android-system and Kernel drain unusual amounts of battery it was location services that was causing it. But not because they were using GPS, but because they kept the device awake the whole time. And there you see my point of switching locating methods. In 90% of the scenarios where people described this kind of behavior of their devices, this solved the problem. But you're right in saying that it's not a permanent solution. I agree to your first two points.
Sent from my SM-N9005 using Tapatalk
Click to expand...
Click to collapse
I always have GPS off and only turn it on when I need it though Android still has the higher or second highest battery usage.

I agree, root and uninstall /freeze bloatware. You'll be surprised.
Sent from my U30GT 2 using XDA Premium 4 mobile app

If you have external sd card in phone, remove & use phone for couples of the day.
Sent from my SM-N9005 using XDA Free mobile app

Just to give quick update, after I wrote my comments here, I fully charged my phone and went to sleep. In the morning battery was down to 80% and that finally prompted me to action. I freezed some apps, cleared cache and did some "housekeeping". I don't know what did the trick, but this time overnight my phone went from 100 to 98%, 10 times better than a night before. Now, after 18 hours of some light use like few calls, couple games, light internet use etc it is still at 80%, so it's pretty much back to what I had before update. I wish I wrote down what I did to track particular culprit in my case, but it is amazing how couple bad apps can ruin battery life, but at the same time killing them turns things around so much. All in all, out of some 340 apps and services on my phone, only 21 are frozen and about 30 are stopped from starting at boot up, but are able to start later if needed.

pete4k said:
Just to give quick update, after I wrote my comments here, I fully charged my phone and went to sleep. In the morning battery was down to 80% and that finally prompted me to action. I freezed some apps, cleared cache and did some "housekeeping". I don't know what did the trick, but this time overnight my phone went from 100 to 98%, 10 times better than a night before. Now, after 18 hours of some light use like few calls, couple games, light internet use etc it is still at 80%, so it's pretty much back to what I had before update. I wish I wrote down what I did to track particular culprit in my case, but it is amazing how couple bad apps can ruin battery life, but at the same time killing them turns things around so much. All in all, out of some 340 apps and services on my phone, only 21 are frozen and about 30 are stopped from starting at boot up, but are able to start later if needed.
Click to expand...
Click to collapse
:victory::victory:
Last question; 340 apps system-wide, or 340 PlayStore apps?

[Q] Android System and Android OS

I know this may be old news and I've done a lot of research before posting this thread.
I've read somewhere that this high percentage/drain in battery due to "Android System" and "Android OS" is caused by android 4.4.2 itself and Snapdragon S800 chip!
I have a N9005 and I've tried 3 roms so far and all of them have this issue and my battery life sucks! I can barely reach 3 hrs screen On even in 12hrs!
I'm currently at 5:40 on battery and it's already at 60% with 1:20 screen on only!
I tried greenify and Wakelock detector as well as Unbounce xposed modules but nothing is really helping!
My question: Is there is any ROM or Kernel that you know about that doesn't have / solve this issue?!
Thank you.

Life Engineer said:
I know this may be old news and I've done a lot of research before posting this thread.
I've read somewhere that this high percentage/drain in battery due to "Android System" and "Android OS" is caused by android 4.4.2 itself and Snapdragon S800 chip!
I have a N9005 and I've tried 3 roms so far and all of them have this issue and my battery life sucks! I can barely reach 3 hrs screen On even in 12hrs!
I'm currently at 5:40 on battery and it's already at 60% with 1:20 screen on only!
I tried greenify and Wakelock detector as well as Unbounce xposed modules but nothing is really helping!
My question: Is there is any ROM or Kernel that you know about that doesn't have / solve this issue?!
Thank you.
Click to expand...
Click to collapse
I would consider you as one of the lucky ones. If you think that's bad then I don't really know what I'm experiencing. I can reach about 2 hrs screen time on in 12 hours before my battery is all drained. Try upgrading to 4.4.4 and see if you can see a difference. But to me it sounds pretty normal, because of the extreme screen Note 3 has it will drain A LOT of battery. What does Wakelock say? What wakes the phone up? Can you post a screenshot of your battery screen?

BunnyPig said:
I would consider you as one of the lucky ones. If you think that's bad then I don't really know what I'm experiencing. I can reach about 2 hrs screen time on in 12 hours before my battery is all drained. Try upgrading to 4.4.4 and see if you can see a difference. But to me it sounds pretty normal, because of the extreme screen Note 3 has it will drain A LOT of battery. What does Wakelock say? What wakes the phone up? Can you post a screenshot of your battery screen?
Click to expand...
Click to collapse
Mine also has only 1 hour of screen time before about 50%, my rom is an extremely debloated stock one, NF4 by Rayman95. Could it be my battery? TIA
N9005 NH1 32GB Stock debloated rooted ROM

This_Guyse said:
Mine also has only 1 hour of screen time before about 50%, my rom is an extremely debloated stock one, NF4 by Rayman95. Could it be my battery? TIA
N9005 NH1 32GB Stock debloated rooted ROM
Click to expand...
Click to collapse
Before we judge the system itself we may want to check your battery first. Try doing a calibration of it. You can find several apps that will calibrate it for you automatically or you can just google "Android calibrate battery" and you'll find tons of tutorials. After you've calibrated your battery, try and see if there is any improvements.
In case nothing got solved or better, try using another ROM (you might even want to try Cyanogenmod stock) and see if there is any changes. If not, then yes, it might be your battery that's giving up.

BunnyPig said:
Before we judge the system itself we may want to check your battery first. Try doing a calibration of it. You can find several apps that will calibrate it for you automatically or you can just google "Android calibrate battery" and you'll find tons of tutorials. After you've calibrated your battery, try and see if there is any improvements.
In case nothing got solved or better, try using another ROM (you might even want to try Cyanogenmod stock) and see if there is any changes. If not, then yes, it might be your battery that's giving up.
Click to expand...
Click to collapse
Yes, might be my battery that's giving up! Tried all of these and didn't work [emoji16][emoji13] Going to get a new battery soon, really appreciate your help though
N9005 NH1 32GB Stock debloated rooted ROM

Try NH1. Though I didn't really have your kind of problem when I was on NF4.

Life Engineer said:
I know this may be old news and I've done a lot of research before posting this thread.
I've read somewhere that this high percentage/drain in battery due to "Android System" and "Android OS" is caused by android 4.4.2 itself and Snapdragon S800 chip!
I have a N9005 and I've tried 3 roms so far and all of them have this issue and my battery life sucks! I can barely reach 3 hrs screen On even in 12hrs!
I'm currently at 5:40 on battery and it's already at 60% with 1:20 screen on only!
I tried greenify and Wakelock detector as well as Unbounce xposed modules but nothing is really helping!
My question: Is there is any ROM or Kernel that you know about that doesn't have / solve this issue?!
Thank you.
Click to expand...
Click to collapse
Go into your dialer and dial *#0228# and there you will find the battery calibrator. If you do this, make sure the phone is charged to 100% and let it discharge. Run it through a few cycles and see what happen. should make a difference.

SM-T715Y now receiving Marshmallow

So I just got the update notification on my 4G Tab S2 region code XID (Indonesia). F/W is on SamMobile as well, and would have installed it if my battery wasn't running low. Will report back soon!

so far it is exactly what I expected - GS7 software on a tablet. Great battery and none of the performance issues the first gen Tab S had when first receiving Lollipop.

AB__CD said:
so far it is exactly what I expected - GS7 software on a tablet. Great battery and none of the performance issues the first gen Tab S had when first receiving Lollipop.
Click to expand...
Click to collapse
Actually, battery life became worse on this update. I lose 1% of battery life in under 3 minutes without doing anything, my tab was just idle in the home screen.

AaronRX said:
Actually, battery life became worse on this update. I lose 1% of battery life in under 3 minutes without doing anything, my tab was just idle in the home screen.
Click to expand...
Click to collapse
That's fairly standard I'd say.

AB__CD said:
That's fairly standard I'd say.
Click to expand...
Click to collapse
But that didn't happen when I was still running Lollipop :/

I've noticed the battery drain too. It's not way worse, but it is slightly quicker at getting rid of charge. Has anyone noticed any other genuine changes? Apart from the lighter colour to the drop-down menu it seems basically identical.

GrandMasterPlank said:
I've noticed the battery drain too. It's not way worse, but it is slightly quicker at getting rid of charge. Has anyone noticed any other genuine changes? Apart from the lighter colour to the drop-down menu it seems basically identical.
Click to expand...
Click to collapse
Battery definitely drains faster in this update. It would take me 7-10mins for me to lose 1% of battery life in Lollipop. But now it would take me 3-5mins to lose 1% of battery life. I'm considering right now to go back to Lollipop to be honest, I can't stand this battery performance.
Other changes I've seen was the boot, it uses the S7 boot animation and there wasn't a boot startup sound.

Are many still waiting for the update?
Is everyone experiencing the rapid batter drain.
No update here.
Shofar

Charging time estimate seems to be gone from notif dropdown (no charging notif at all) and lock screen (just says charging, no more x hours x minutes until full)

Marshmallow works fine. The battery issues were and will always be there for first few days till the firmware settles in.
One problem i faced was not audio output on one of my bose earphones. I still get the output on an older pair. The new ones work fine with every other device including a note 5. Just not this tab. Any suggestions to make it work ?

Are there many of you still without MM?
More than a week and still nothing.
Is it simple to install from Sam Mobile?
Getting frustrated with Samsung.
Shofar1

ayush12345 said:
Marshmallow works fine. The battery issues were and will always be there for first few days till the firmware settles in.
One problem i faced was not audio output on one of my bose earphones. I still get the output on an older pair. The new ones work fine with every other device including a note 5. Just not this tab. Any suggestions to make it work ?
Click to expand...
Click to collapse
Hopefully the battery issues are just temporary just like what you said, I am getting tired of this battery drain. This never existed in Lollipop.
About your earphones, maybe the Tab doesn't recognize it?

I guess I'll wait. Lollipop is not so bad....

AaronRX said:
Battery definitely drains faster in this update. It would take me 7-10mins for me to lose 1% of battery life in Lollipop.
Click to expand...
Click to collapse
I'm still on 5.02 and I must be lucky!

AaronRX said:
Hopefully the battery issues are just temporary just like what you said, I am getting tired of this battery drain. This never existed in Lollipop.
About your earphones, maybe the Tab doesn't recognize it?
Click to expand...
Click to collapse
The main reason why I stayed on lollipop with my tab s2 and Glad i turned automatic updates off....I learned my lesson when I put marshmallow on my galaxy s6 edge plus and the battery life was terrible....

Is there adaptable storage on mm?
Sent from my SM-G9287C using Tapatalk

bimmerboii said:
Is there adaptable storage on mm?
Click to expand...
Click to collapse
Not to my knowledge. Dont have a microSD in my tab to test.

Still waiting
I upgraded from nexus 7 to the T715Y galaxy tab s2 8". Solid device, battery performance less than optimal, software updates non existant. The nexus still gets monthly security patching and got the android 6 OTA update in short order. Now 18 July and despite indonesia, panama, phillipines and other neighbours in asia having this update, still no word from Samsung. Tried Kies, side sync and OTA update button mashing... nothing.
In fact Kies said there was an update, which i installed, wiping my tablet to get .. you guessed it, the same darn version i had. 5.0.2. Would recommend the tablet if not for the lack of security and software updates.

Still waiting in Australia
Edit: finally got it about a week ago

Is Downgrade Possible on N910C?

Hello,
So I've been wanting to downgrade back to android 4.4.4 mainly for better battery performance, because ever since it went 5.0.1 and up the battery went downhill fast. However, I've been reading that the N910C got a locked bootloader after android 5.1.1, is there anyway to downgrade the bootloader so I could downgrade to android 4.4.4?
Thank you in advance!

Rimv911 said:
Hello,
So I've been wanting to downgrade back to android 4.4.4 mainly for better battery performance, because ever since it went 5.0.1 and up the battery went downhill fast. However, I've been reading that the N910C got a locked bootloader after android 5.1.1, is there anyway to downgrade the bootloader so I could downgrade to android 4.4.4?
Thank you in advance!
Click to expand...
Click to collapse
Downgrade is impossible lower that 5.1.1

Maybe it's just time for a new battery?

Kinsman-UK said:
Maybe it's just time for a new battery?
Click to expand...
Click to collapse
Yes that's true i was also frustrated from battery life on marshmallow but since i bought new battery everything is good and even better.

Trex888 said:
Yes that's true i was also frustrated from battery life on marshmallow but since i bought new battery everything is good and even better.
Click to expand...
Click to collapse
My battery is 2 months old, nothing has changed since I replaced my 2 year old original battery with the new one, except the phone doesn't turn off randomly at 30% now.

Rimv911 said:
My battery is 2 months old, nothing has changed since I replaced my 2 year old original battery with the new one, except the phone doesn't turn off randomly at 30% now.
Click to expand...
Click to collapse
You got powersaving mode,ultra powersaving mode,USE THEM dude while your device in pocket or on idle.
I got 5+ hours screen on time .
Disable touch vibration
Disable keypad light.
Reduce brightness manually.
Turnoff gps,wifi,mobile data, when you are not using phone.
Use dark black wallpaper.
Remove widgets from homescreen.
Use greenify to hibernate apps.
Uninstall/disable apps you dont use.
Your battery is perfect just you have to be smart how to save.

Rimv911 said:
My battery is 2 months old, nothing has changed since I replaced my 2 year old original battery with the new one, except the phone doesn't turn off randomly at 30% now.
Click to expand...
Click to collapse
Make sure the new battery is purchased direct from Samsung or a reputable carrier, or get a Powerbear or Anker. Lots of fakes/cheap rubbish about.
I'm on Marshmallow and get 5-6 hours screen on time with WiFi and Bluetooth on all day. 6 month old battery from Samsung UK.

Trex888 said:
Yes that's true i was also frustrated from battery life on marshmallow but since i bought new battery everything is good and even better.
Click to expand...
Click to collapse
Trex888 said:
You got powersaving mode,ultra powersaving mode,USE THEM dude while your device in pocket or on idle.
I got 5+ hours screen on time .
Disable touch vibration
Disable keypad light.
Reduce brightness manually.
Turnoff gps,wifi,mobile data, when you are not using phone.
Use dark black wallpaper.
Remove widgets from homescreen.
Use greenify to hibernate apps.
Uninstall/disable apps you dont use.
Your battery is perfect just you have to be smart how to save.
Click to expand...
Click to collapse
Brand new OEM battery and believe me when I say I tried tu use the damn phone in a most efficient way possible, even airplane mode when not in use, same crap, terrible battery life. When I bought it couple months after release, with 4.4.4 the battery was just amazing, like 10-12 hours of screen on time, now I barely get 2 hours with EVERYTHING on power saving mode and MAX EFFICIENCY use battery wise...

Rimv911 said:
Brand new OEM battery and believe me when I say I tried tu use the damn phone in a most efficient way possible, even airplane mode when not in use, same crap, terrible battery life. When I bought it couple months after release, with 4.4.4 the battery was just amazing, like 10-12 hours of screen on time, now I barely get 2 hours with EVERYTHING on power saving mode and MAX EFFICIENCY use battery wise...
Click to expand...
Click to collapse
I donno about n910c but i have n910t and i tried every single rom kk lollipop mm maximum screen on time i get 5 hours on kitkat and mm 4.5 hours and the worse is lollipop 3 hours.

I went all the way from 4.4.4 to 6.0.1 update by update as they were rolled out, every single update it got worse and worse, 5.0.1 was just obnoxiously terrible, then 5.1.1 kinda bit better compared to 5.0.1 but still crap, 6.0.1 brought in Doze, but that didn't seem to affect anything too much, so pretty much from 5.0.1 forward, battery is just stupidly terrible, I charge the phone 3 times a day on average...

Oreo + stability update

Hi,
I have been using this phone for a year now. I really feel we got more preformance after oreo. The phone is pretty smooth after all the hassle. I do think we lost a bit screen on time with the os update. I feel that is many times the price of getting more speed. Anyway i tried for a while my G4 rooted + optimized. My conclusion is that optimized + sabs and non rooted s7 edge is really fast phone. I see no lag. I feel this phone has a year left in it and thats actually impressive knowing its 2,5 years old.
I tried Oreo without factory reset. My experience was that some of the apps did not function well. So i did the factory reset and all works now. I think its only smart move after os update. Now i will just clear system cache after minor fixes.
The last as good deal was lg g2 to me. Love your phone still its in the competition with never phones. After year i bet we see improvements that will make many of us consider changing to a next generation of phones.
Btw. Did anyone else get the stability update after oreo? What do you guys think of it? My feel is that now almost 100% is working and smooth as a butter.
Model: SM-G935F, Exynos

You need to specify what version of the phone you actually have.

Thanks for the comment.
I edited the first post to give the model of my phone
SM-G935F, Exynos

Pallonaado said:
Thanks for the comment.
I edited the first post to give the model of my phone
SM-G935F, Exynos
Click to expand...
Click to collapse
I have moved back to nougat and stayed there for now, i did not mind the cell drain as it still lasted me all day, however i had random reboots as soon as i moved to official Oreo or even custom rom with 8.0 base, did not matter what i did the reboots would get worse over time. I moved back to nougat and not one reboot experienced, Oreo for me is good when it worked and would love to use it but drove me crackers when rebooting. SM-G935F

daveparki said:
i did not mind the cell drain as it still lasted me all day, however i had random reboots as soon as i moved to official Oreo or even custom rom with 8.0 base, did not matter what i did the reboots would get worse over time.
Click to expand...
Click to collapse
This is actually intresting. My phone did random screen freeze and couple of reboots in nougat, but on Oreo that is not happening to me.
But i do definetly have the cell drain still after the last update. I kind of woke up by the fact that i have lost about 1h screen on time. Yes i am a heavy user so thats the first que for something is eating the battery.
What kind of cycle your battery lasts average and how is your SOT on nougat? My is average 27hours on time hours and sot 5-6 hours

Pallonaado said:
This is actually intresting. My phone did random screen freeze and couple of reboots in nougat, but on Oreo that is not happening to me.
But i do definetly have the cell drain still after the last update. I kind of woke up by the fact that i have lost about 1h screen on time. Yes i am a heavy user so thats the first que for something is eating the battery.
What kind of cycle your battery lasts average and how is your SOT on nougat? My is average 27hours on time hours and sot 5-6 hours
Click to expand...
Click to collapse
I am unable to advise you on SOT as i don't monitor this, i am running a custom rom with nougat base (Sac23 S8 port) i have a battery life of between 29 and 32 hours, never really goes past 40% remaining at the end of the day.