yashsingh1/xdaforums huggingface dataset:
[Galaxy S6 General] ra9b:
Science Lesson

So I've read a few pages of this thread, and I'd like to just shed some science on Samsung's choice of battery size. Let's start with a bit of prerequisite knowledge.

Processors consist of many many transistors, CMOS transistors to be precise. CMOS transistors (CMOSFET) are actually a pMOSFET and an nMOSFET combined. The p and n stand for the doping levels of the semiconductors used (Silicon/Germanium/etc.) A MOSFET stands for a Metal-Oxide-Semiconductor Field Effect Transistor, where the metal and semiconductor can be considered as the two parallel plates of a capacitor, and the oxide is the dielectric vacuum between these two plates (not exactly right, but for simplicity's sake) There are many deviations from the ideal when it comes to these transistors, and the one that Samsung exploited is considered the "Hot Carrier Effect", which states that at high voltages, some electrons and holes (absence of electrons in a sea of electrons) will actually be able to Quantum Mechanically diffuse into the oxide of the MOSFET. This causes a lot of reliability issues, so chip manufacturers want to make sure that the voltages supplied aren't too high. Now, the width of a transistor comes from a combination of the width of the oxide, and the width of the saturation region of the semiconductor (not important for this lesson.) Naturally, if something is thinner, than that means that it will be more likely for things to diffuse through it. Therefore, the thinner a transistor gets, the less voltage is supplied to it. For example, a 1 um "thick" transistor would require a supply voltage of 5.0 V, whereas a 32 nm thin transistor only requires a supply voltage of 0.8 V.

Samsung worked really hard on the processor design of this device, and they were able to come up with a 14 nm thin processor. Does this mean that each transistor is 14 nm thin? If so, than that means that the transistors are laid out in a flat line. The transistors could be thinner if they are laid out on top of each other, in layers of a circuit. Idk how Samsung laid their transistors out, but regardless, we know that the transistor is at least 14 nm thin, if not thinner. This means that the voltage that is supplied to the transistors is around 0.4 V. Meanwhile, the Snapdragon 801 is 28 nm, so it would require a supply voltage closer to 0.7 V. This means that the voltage required to operate the processor is lower for Samsung, than say, the HTC M8.

Due to this phenomenon, Samsung was able to keep the device as thin as they wanted, while still giving a good battery life, since the thinness of the processor allowed for a smaller battery. Obviously, Samsung could have used a crazy 3900 mAh battery, but then the battery life would be ridiculous, and the device would be fat.

Moral of the story, be happy with what you got; Samsung used a small battery because science. :good:

Sources:

I am an Electrical Engineer enrolled at the Georgia Institute of Technology. Go Jackets!
[Galaxy S6 General] dhaliwal925:
Thank you for the lesson, but this isn't really helping me increase my actual usage out of the phone...
[Galaxy S6 General] D_Magic:
On the first charge and impressed with the battery

Constant WiFi and downloaded 70 albums on Spotify
[Galaxy S6 General] crobo:
Coming from a LG G2 I have to say that the battery life is pretty poor.

I know what the biggest battery drain apps/settings are so i disable/remove them but even then the battery is still pretty poor.

My screen is always on auto brightness and in the evening at home even on the lowest setting.

I disable the most communication stuff, like bluetooth, nfs, gps, internet. (At home i use wifi)

I dont use Facebook, twitter, instagram and Youtube. And i also dont play Games.

And I don't have the back LED light problem.

Most of the time i use the phone for Whatsapp, browsing and taking/watching photo's.

I have to say that the LG G2 had a great (big) battery, but even after a good year 1.5 of usage, the battery was better than the new galaxy s6.

Hopefully there will be some kind of software/firmware update which will improve battery life.
[Galaxy S6 General] XQC:
What does "pretty poor" mean? Numbers, please
[Galaxy S6 General] KarlDag:
64 pages in this thread already, all the numbers one needs...
[Galaxy S6 General] X-Ter:
So far battery life has been bad. I'm hoping more charge cycles will fix it.

Right now I'm fully charging my S6 and my Nexus 4 and I'm going to leave them unused and compare the standby drain. I have a feeling they're going to be equally bad and the S6 might even be worse. I've even got more apps installed on my Nexus and have Google Now enabled. I'll try to keep the settings (wi-fi, GPS etc) the same and see what happens.
[Galaxy S6 General] CLARiiON:
64-pages, there is still no consistent pattern. What exactly are you trying to imply?
[Galaxy S6 General] KarlDag:
That what you see is what you get. Somewhere around 4 and 5 hours SOT, somewhere around 18:00 total time. You won't get a clear pattern because everyone's use is different. Either you can live with this, or can't. It's clearly less than my G2, but no phone has no weakness. Camera is miles better, so is software and build quality.
[Galaxy S6 General] ra9b:
haha it wasn't supposed to. I was just explaining why Samsung opted to use a 2550 mAh battery. honestly, from the reports/screenshots people are posting, i don't see what the problem is for battery life. people are getting a consistent SOT of 4+ hours. on my htc one m7, i get maybe 2 or 3 hours of SOT for like 16 hours of usage. I am definitely looking forward to the battery life of this phone. if 4 -5 hours SOT isn't enough for you, you have to either get a phone meant for battery life (like a droid turbo), or enjoy the world outside your phone with friends IMO.
[Galaxy S6 General] chrcol:
I know this isnt an S6 but word of warning.

my 2 month old oneplusone (which cannot remove battery) died today and I think the battery is dead, battery life down even when charging and now it wont turn on at all, if I had this sort of issue on a sammy I would just swap battery but I cannot do.

This experience is going to make me stay well away from any phone where the battery is not swappable.
[Galaxy S6 General] KarlDag:
Except with Samsung you can *easily* get it fixed under warranty. Going with OPO 2 months ago, with all the information available about their cramps support was a big gamble. Sorry your stuck in a bad place now.
[Galaxy S6 General] chrcol:
the phone was only a play thing to test roms and such, the s5 901f is my daily driver luckily, but thought I would post here as a reminder of the risk of going for permanent battery.

I assume i can get the OPO dealt with under warranty as I have only had it for 2 months.
[Galaxy S6 General] kiko3:
My htc one m7 2 years old with non removable battery is still working
[Galaxy S6 General] KarlDag:
Hope you can, but they've refused RMAs to people for idiot reasons.

So is my G2, as good as when I got it. Battery life I mean, not the rest.
[Galaxy S6 General] drmclove69:
Anyone else have android system at the top of the battery stats?
[Galaxy S6 General] crazymook:
Signal definitely seems to be a far bigger battery drain than on my S5.
[Galaxy S6 General] elbos2k:
Not on my phone. Screen is usually the one on top...
[Galaxy S6 General] drmclove69:
That's what I would figure but it's the opposite for me...I will wait till next battery cycle and see if it continues.
[Galaxy S6 General] KarlDag:
Depends what you do, too. I was at work all day working, and I walk a lot there. Google play services was on top, I guess it's the pedometer in a health keeping up all day.
[Galaxy S6 General] belloni:
On my first charge cycle at 5% as I write this with 5:15 hours screen on time with 12:50 hours stand by. Impressed so far, even coming from a Z2. Hope it improves!
[Galaxy S6 General] johanbiff:
Great batterylife on 920F

Must be t-mobile thats the enemy here.. I havet 920F unlocked With great batterylife!!

Greetings from sweden

50% brightness. Wifi always on, photoshoots.. little surfing and lots of texting, first charge. loving this phone so far!
[Galaxy S6 General] geoff5093:
So far I'm not happy with the battery life. I'm coming from a Verizon G3, where the phone would stay at 100% for several hours, and by the end of the day would be anywhere from 30-50%. I received my S6 yesterday, got everything set back up and use the same apps as my G3, but within a couple minutes the battery was already at 99%, then 20 minutes later was in the mid 90's.

This is the first full day on a charge, with very light use, and this is what I have so far:

Taken off the charger around 6AM at 100%, and now at 7PM it's at 13%.

13 hours on battery

1h 32m SOT

I installed Greenify and GSAM battery monitor, hopefully that will help.
[Galaxy S6 General] jambo89liam:
First day not impressed with cell standby. Not even 4hours screen on.
[Galaxy S6 General] crazymook:
!2% without signal. I mean theres your issue. Were you someplace with no reception?
[Galaxy S6 General] haqone:
Turn WiFi calling and the WiFi scanning off to resolve your cell stand by issue. That's why your phone is eating battery.
[Galaxy S6 General] drmclove69:
Not bad other than wondering why I'm the only one getting high android system usage.
[Galaxy S6 General] drmclove69:
Going to turn off WiFi calling this next cycle see how much better stats I can get, thanks for info.
[Galaxy S6 General] rigssanchez:
Anyone know what I have on causing Google app, Google play services, and Android OS to be top battery usage? (See 5% screenshot) Its the same thing today. (36% screenshot)

Looking to get about the almost 4 hour SOT again.

Also I am using google now launcher

and Full GPS location is on.

Plus still have WiFi, WiFi calling, WiFi scanning, and volte off.

Thanks
[Galaxy S6 General] drmclove69:
Deff Google now.
[Galaxy S6 General] KarlDag:
Full GPS location does take lots of battery. Use high accuracy, which also uses Wi-Fi and cell towers. Also, if you use Google fit or s health I think their use of sensors could cause that.
[Galaxy S6 General] schumi_84:
Did anyone discover if AMOLED panel of flat S6 is the same of edge S6, just not bended? Since battery MAh is a little different (50 MAh more for edge) I was wondering if display energy consumption is also different.
[Galaxy S6 General] archheretic:
Is there anyone here who mainly uses this on mobile data, as opposed to wifi? My work doesn't have usable wifi, so aside from maybe 4-hours a day at home, my phone sits on mobile data all day. My current htc one m7 gets only about 2 hours screen on time this way, which I can manage, but would be hoping for a reasonable improvement on this, do you guys think this is achievable?-will have perfect reception all day, google now on, battery saving gps, no location history, moto 360 connected. Cheers!
[Galaxy S6 General] benjmiester:
Hey Karly. I see you all the time on youtube, especially the Zenfone vids. Did you end up getting a Zenfone? That was my other front runner, but they took forever releasing it in the U.S. so I gave up and go the S6. If you got one, how does it seem to compare?
[Galaxy S6 General] haqone:
I'm only on LTE as I'm always on the move. Here is today's. Usage so far. FYI I had an m7 then got an m8 which was way better than the m7 for battery life. The galaxy s6 is even better than my m8 on a custom rom. Here is from today so far.
[Galaxy S6 General] omersak:
How on earth do you make your phone idle so well? I've installed nothing and have everything disabled apart from messenger and one email account syncing - yet the phone just does not go into deep-sleep when I'm on data/LTE. Location/Google Now/NFC/Smart WiFi all disabled.

The best I've managed even after the new firmware is 12 hours standby with 3 hours SoT.
[Galaxy S6 General] WhiteHartMart:
Just awful battery here although only on 3rd charge cycle.

Latest cycle stats:-

7 hours of this I was asleep. Phone seems to be going into deep sleep fine according to BBS so just can't see how I'm not getting at least 2-3 hours SOT.

This is on 3 UK firmware - might flash unbranded BTU via Odin and test that.
[Galaxy S6 General] haqone:
Not sure. I actually leave on email syncing for two accounts. I also have Google now and location and blue tooth on most the time.

---------- Post added at 08:22 AM ---------- Previous post was at 08:20 AM ----------

Do you allow your phone to send usage statistics to Google and Samsung? It was during setup I said no to both.
[Galaxy S6 General] jntdroid:
Edit: TLDR - it ain't that bad...

I hate to say it but that's going to be a common thread for a lot of newer phones. The only phone I've used with better battery life than the G2 is the Droid Turbo, and even that was close at times. The Note 4 was also comparable, but not consistently better.

Also (and this isn't directed at you specifically), when we're looking at total battery life and comparing phones, we need to include charge time, and also practicality when compared to your own usage pattern. For example, the Droid Turbo was great, but I still found myself charging it every night b/c it would still be almost dead halfway through day 2, so the additional battery life wasn't much of a benefit to me - same with the LG G2. Both phones were pretty much guaranteed to get me through a day, but took 2-4 hours to charge (depending on the phone).

So far in my 2 days with the S6, it'll easily get me through a day on light to average usage (for me) b/c it idles really really well (Verizon version here). Heavy usage might require a charger by late evening, or I can just plug it into the quick charger in my car on my 20 minute drive home and not even worry about it. Or I can plug it in at work for 30+ minutes and definitely not worry about it. I get that not everyone has that option, but I have a similar peace of mind with that strategy as I did with the "big battery" phones I've had in the past. Or I'm just justifying it b/c it's pretty much the only semi-weak point for this phone... ;)

I'll add that my experience with both generations of the Moto X was the same or worse in the battery life realm - rarely getting more than 2-3 hours of SOT in a given day. The only difference there was the X's would drop 10-15% or more overnight. The S6 holds quite steady when I'm not using it... so far a 1-2% per hour drop rate depending on my cell signal (which is admittedly strong in most places I frequent). Overnight last night it only dropped 3% in a 5-6 hour timeframe, and I left everything normal.

And that's not even implementing any "UPS" (ultra power saving mode) strategies like enabling it while you're asleep or in a meeting or something along those lines...

---------- Post added at 02:45 AM ---------- Previous post was at 02:39 AM ----------

How do you only have 6% consumption from your screen if you have 19 hours of total life and 5 hours SOT?
[Galaxy S6 General] haqone:
No idea. Here is the screen shot from GSam battery
[Galaxy S6 General] omersak:
Damn, it's been awake for only 43 minutes in 20 hours. I've had min off charge and idle for 3 hours and its been awake for 2 hours 13 minutes Want to exchange devices?

Seriously though, do you have location and auto-sync on?
[Galaxy S6 General] haqone:
Yup
[Galaxy S6 General] omersak:
Please teach me your ways. As a willing student, I promise to never bring shame and dishonor upon your legacy.
[Galaxy S6 General] iCalculate:
Not sure how this compares but battery life is average at best. This is with 4g only on for a couple hours
[Galaxy S6 General] jambo89liam:
I will try that today to be honest I don't get a great signal at my house or my girlfriends. Where I spent most of my time yesterday.
[Galaxy S6 General] lawtq:
That's painful!

I'm on O2 UK firmware. Woke up this morning.... After 7 hours sleep 1% used! I can't believe it!

Yesterday put it on change with 15% left, having done 6hrs 15 minutes sot. Would have achieved 7 hours sot if drained to 1%

My cell drain was almost nothing. 1%
[Galaxy S6 General] tuk1maar:
Well, my S6 arrives tomorrow and now I am kinda worried...

With my S4 I get around 5.5 hours SOT over a full day on Lollipop from Samsung. That's on 4G/Edge/WiFi. I just snapchat, use FB through the webbrowser, WhatsApp and instagram. Brightness is usually around 10%-50%, sometimes at 100% but that's only for like 20 minutes during the entire day.
[Galaxy S6 General] X-Ter:
What kind of wizardry did you do to get 1% loss after 7 hours? I'm on O2 as well and my battery is draining at least 10% overnight.
[Galaxy S6 General] crazymook:
This phone sits awake a TON it seems when idle. And with no way to check wakelocks without root, kind of f'd.
[Galaxy S6 General] Sevael:
SM-920W8 (Canadian) variant. WiFi and Bluetooth always on, two accounts set to push email, one account set to sync everything, screen brightness on auto (though mostly used in a bright environment, hence the big drops where I was using it with the screen on). It's pretty decent on standby for stock unrooted. Software version ending in CG.

Over 24 hours since last charge and over 3 hours of screen time and still 44% left. No complaints here.
[Galaxy S6 General] arayoflight:
Battery life is awesome

So I finally got mine. I have the Indian variant(G920I). Let the screenshots do the talking.

My usage: Browsing, installing apps, YouTube, a little benchmarking( had to see the beast).

Brightness: set to suitable brightness depending on the condition: 50-60% in daytime, Auto-100% in sunlight( it's really bright), 0% in night for reading, 20% usually.

Auto-sync on, sound on 100%, no power saving enabled until 15%.

Also, it's a freaking beast in stand-by. I slept for 5.5 hours as you can see in the screenshot. It didn't drop even 1 percent. It was on 59% when I slept and stayed there until I woke up.

Super impressed.
[Galaxy S6 General] LNJ:
I know this is not actually representative of actual standby and full day use time but I've been fiddling wit it since I woke up and so far so good!
[Galaxy S6 General] Slicktune:
How in the world??? I did the same thing slept for 6hrs and 49 mins... and it ate 7% what's your set up?? Do u have location off?? I do..but that's horrible battery for me...

And this is me now....

I just don't get it, I closed all apps before I went to bed aswell..

Please help.. thanks in advance...!!
[Galaxy S6 General] CLARiiON:
(A random thought)

Non-US variants seem to be getting better battery numbers compared to US variants.
[Galaxy S6 General] Slicktune:
That's what I'm thinking, maybe I should buy an Indian variant.... or maybe we (U.S.A users) should wait for a modem update???
[Galaxy S6 General] arayoflight:
I basically dumb down my phone when I go to sleep. WiFi off, location off, mobile data off. Only the network and alarm are on. There is absolutely no reason for the phone to consume 7% battery.

Also, we own different variants. You probably own a U.S. variant which are so far notorious for poor battery life so far( thanks carriers). Difference in radios make a world of difference.

BTW, that was my first drain. I'm getting similar battery life now. Today I used my phone more heavily and it has 5 hour 40 min screen-on time with 10% battery remaining. Will update it with today's stand-by when I sleep.

You should wait for an update. I got a software update out of the box.
[Galaxy S6 General] WhiteHartMart:
I must have a problem device love the screen and audio quality but I'm struggling to get 2 hours SOT - this device is useless as a daily for me :(
[Galaxy S6 General] CLARiiON:
Maybe try using BBS, I don't trust other battery apps. BBS should give you more info on wakelocks as well. Check if you get better battery in HSPA mode compared to 4G.
[Galaxy S6 General] crazymook:
BBS wont give you wakelock stats unrooted, at least not with lollipop.
[Galaxy S6 General] drmclove69:
Us version and only missing 1% everytime I wake up
[Galaxy S6 General] crazymook:
My idle / sleep time is absolutely horrid. To the point where I'm debating a factory reset.
[Galaxy S6 General] visitor29:
Personally for me s6 battery not good, I understand maybe it's normal for now stock rom, kernel etc (using only 2nd day), but today for general use calling, sms, some browsing in Facebook, what's up, email etc and phone already 2nd time plugged on charging this is big day/night difference from xperia z2 my 2nd phone (from early morning to late evening and no worries about till morning) . Hopefully will get soon option use modified roms, kernels and all other goodies from developer out there.

Sent from my Nexus 9
[Galaxy S6 General] easycure1974:
The iPhone 6+ is a lot above average. My iPhone 6+ is killing my Note 4

Skickat från min iPhone med Tapatalk
[Galaxy S6 General] jntdroid:
Nothing will unrooted - right?
[Galaxy S6 General] crazymook:
I thought back before I rooted my S5 (on KK), you could see at least kernel WLs.
[Galaxy S6 General] zathus:
Here's my theory as to why cell standby is so draining now. Its the single antenna. The used to have 2, one for 1x (making calls and basic texting) and one for data. Data not in use, no power used because the 1x drew little power. Now with the push to volte (about a year away from being solid, live to early IMO) things like cell standby are using a much more powerful antenna hence using more power. All newer phones with the single antenna are having this issue. Go look at the droid turbo forms. It's a stupid move, & I don't think a software update is going to fix it.

PS. It might be single antenna with duel modems that changed..I'm not sure but the end result is the same
[Galaxy S6 General] elbos2k:
People with battery drain, do you have widgets on the sceen? Do you clear all apps when you're done using them? I believe some of you leave apps open. I'm averaging about 5H and 30 minutes of SoT. I have sync off, location off, auto brightness on. Also check your wifi advance settings. You might have stuff checked that you dont really need. You might also have to consider doing a full reset on your phone. I know, it sucks but it can solve your battery drain.
[Galaxy S6 General] syphen6:
I fixed my horrid battery drain by switching to cdma only when im at the house since im on wifi anyways. My low lte signal was killing this thing.
[Galaxy S6 General] trenzterra:
It's frustrating. When I first got the phone VOLTE wasn't yet enabled, so battery life was pretty good. The next morning, VOLTE was enabled and that's where I started getting horrid battery life. It would drain a few percent every hour, and its wakelock was about 30mins per hour. There's no way I can disable VOLTE, it seems, even after selecting the option from Call Settings, the double arrows still appear.
[Galaxy S6 General] LNJ:
The only issue there is that you should have to turn everything off!

I'm on full sync and can manage over 4 hours of SOT.
[Galaxy S6 General] elbos2k:
I only turn them off because I don't use them. With those options enabled, I can get 5 hours SoT no problem.
[Galaxy S6 General] jntdroid:
I charged my phone fully, while powered off. I turned it on about 15 min ago and GSAM is showing me this... How can I tell what's pushing 120mb + in 15 minutes??
[Galaxy S6 General] elbos2k:
Maybe you're backing up some stuff or uploading stuff from your phone?
[Galaxy S6 General] Clay330i:
Interesting baseline for those of you that haven't seen it. Take the results with a grain of salt..

Watch "Galaxy S6 vs. S5 vs. Note 4 vs. Note 3 SOT(Screen-On-Time) Battery Test!" on YouTube

Galaxy S6 vs. S5 vs. Note 4 vs. Note 3 SOT(Screen-On-Time) Battery Test!:

https://youtu.be/3OXPfItYKo0
[Galaxy S6 General] erodeox:
What's the point of being an advanced smartphone when you disable many of its connectivity and options, just to squeeze what an iPhone 6 could achieve with all that set on auto?
[Galaxy S6 General] VisionNN:
These are my results. I'm in the basement so cell reception is quite low, but even so, not too bad for me.. Especially with fast charge, I'm not even complaining.
[Galaxy S6 General] :
Can we see somehow history details like before in S5? I can't find details in S6 :rolleyes:.