Samsung Galaxy s7 overheats - Samsung Galaxy S7 Questions and Answers

My uncle gave me his old Samsung s7 because he didn't use it, after formatting I noticed it would get really hot in normal use, so I decided to put it on stress, I recorded 4k for 15 mins and after that I switched to CPU-z and it said it was 59 °C and the battery was 42, I noticed that the battery drains at the speed of light while the phone is really hot, I searched online but all I get is to uninstall bloatware and such but I already installed a custom rom and it's the same, but a bit better first tests I did were on the stock rom. This occurs not charging, but if I charge the phone and give it use, it gets worse until the phone notifies me with a popup. The phone has been dropped a few times but no water damage. I really don't wanna take the phone apart but I think I don't have any choice, what should I do?

Btw if I don't use the phone the battery lasts at least 4 or 5 days, like if I only use it to answer WhatsApp and use Instagram for a couple of minutes.

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[Q] Worried about my battery life

Hey guys,
I just recently got a refurbished phone from T-Mobile's insurance replacement. My brother gave the phone to me instead and opted for something else. So phone right out of the box had 100%, used it lightly and I noticed every 4-5 minutes that i spent looking at the screen the phone would drop between 1-2% and this is just me looking at settings and downloading updates. So I figured maybe it was just the updates being intensive.
So I get my case and screen protector and I turn off my phone and let it charge on off to 100%. Turn it back on and start using it like I normally would (keep in mind if I have stamina on) I like to have my screen brightness at the highest while watching videos so I watch 3 videos over my LTE connection on youtube and then I hope into my car and listen to a audio book that's already downloaded. Time lapse was probably about 30-40 minutes.
When I get home the phone is down to 85%. Is it normal to lose 15% in less then a hour on this phone? This worries me because I want to utilize the life log and during my 9 hour shift at work I listen to spotify about 6 of those hours... maybe I have a dud battery? Every where I go everyone says it lasts all day with moderate use... but at this rate my phone would be dead before my shift even ends...
EvoRollen said:
Hey guys,
I just recently got a refurbished phone from T-Mobile's insurance replacement. My brother gave the phone to me instead and opted for something else. So phone right out of the box had 100%, used it lightly and I noticed every 4-5 minutes that i spent looking at the screen the phone would drop between 1-2% and this is just me looking at settings and downloading updates. So I figured maybe it was just the updates being intensive.
So I get my case and screen protector and I turn off my phone and let it charge on off to 100%. Turn it back on and start using it like I normally would (keep in mind if I have stamina on) I like to have my screen brightness at the highest while watching videos so I watch 3 videos over my LTE connection on youtube and then I hope into my car and listen to a audio book that's already downloaded. Time lapse was probably about 30-40 minutes.
When I get home the phone is down to 85%. Is it normal to lose 15% in less then a hour on this phone? This worries me because I want to utilize the life log and during my 9 hour shift at work I listen to spotify about 6 of those hours... maybe I have a dud battery? Every where I go everyone says it lasts all day with moderate use... but at this rate my phone would be dead before my shift even ends...
Click to expand...
Click to collapse
Um what? What kind of phone did you have before? Did it have better battery life? Because the only phone I've ever had that had better battery than the Z3 was my Z1C (usually 7 hours)
Also, max brightness and 5 minutes per 1%? You know that equals 8 hours of screen-on time? IE a better battery than ANY PHONE ON THE MARKET HAS? You need some perspective, your expectations only make sense if you came from a Nokia 5110
I had a iphone 4S before this. My expectations are like this because every where I read reviews everyone says "insane battery life" "Lasts all day" and even the sony site boasted how the phone can last all day with stamina off and with stamina on it can last 2 days and with stamina ultra supposedly a week. This is why I'm worried about what's going on with my device.
If there are better sources with realistic numbers i'd greatly appreciate it to put me to ease.
I just set all the settings on my phone to get the maximum battery life except ultra stamina and even froze/disabled apps that i don't need. Yet I'm still draining just the same, I like to watch videos on youtube and play spotify and watching vids on youtube for about 30-40 minutes I drain about 10% with all the new settings. Brightness is also on minimum now and have that option for it ticked as well.
Just wanted to give feedback on the phone and having it for a week now. The battery life is truely amazing, It almost drains nothing when in standby its like the phone isn't even on at all yet sync is coming in with updates. This is a great phone and I have yet to have it die on me before getting home.

Thoughts on the Verizon G5 so far?

I took advantage of the BOGO offer from Verizon and got two LG G5 at Costco. I've been using my phone lightly, but I can't help but complain about the major issues that gets everyone else talking: Battery life.
I see other people have screenshots of achieving 6-7 hours of SOT, but I'm seeing nowhere near that. The most SOT I can see is having 3 hours before hitting to a depleted battery. Occasionally as well, the phone feels pretty hot to touch when it idles or have some fair amount of usage. Even right now I have it inside a thick, bulky protective case, and i can feel the heat from the back. Is it the SD820 or is there something off?
Just to make a comparison, I have been using the Sony Xperia Z3v for a year and a half with Verizon since its release and it's a great all around phone. I usually achieve 5 hours of screen on time or even more depending on how heavy I've used it. Waterproof, dual front facing speakers, 20.7 MP camera (although very outmatched by the G5's), and the power saver absolutely works. What I mean by that is that when the power saver is on in the G5, nothing seems to load at all.
So the overall question is, how is this phone for everyone? I absolutely love the camera, but the battery drainage and overheating is an issue for me. I've had thoughts about exchanging for the S7 Edge since it's pretty much a direct upgrade of my Xperia, but I'd like to see what the G5 can really offer. Oh and, how long is it until I get the extra G5 accessories from doing that bundle deal? Thanks.
You know I've noticed peoples complaints about that but to be honest I think its just certain phones that had these issues. I don't know how but mine hasn't been hot since I first set it up. My battery life lasts me a full 8 to 10 hours depending on if I do too much gaming or YouTube. Those are my biggest battery abusers. But I made sure to deactivate the bloatware Verizon wanted to install. I've had a good experience with mine. The only time I've been mind boggled was when out of the blue chrome would cause the phone to freeze up till I reset chrome. Other than that my device has been running so smooth.
Sent from my VS987 using XDA-Developers mobile app
I've been one of the people complaining about battery life. In the first week or so that I had my phone, battery life was miserable. I need to be completely honest here though. After getting into my second week of using this phone, my battery life has greatly improved. In my honest opinion, I think it needs about a good week to 'settle' or 'break in'. I've done nothing different done I set my phone up and I have deleted any apps or anything. I don't know if this is the case for anyone else or not.
I like the phone a lot. It is fast and everything works well.
The only things that I want improved are
1) Screen brightness adjustment. Too dark in dimly lit areas and too bright in normal room lighting.
2) Battery Life. This is a strange one. Some days I have really good life, but sometimes the standby use it high. Google Play Services sometimes eats a lot of battery. I have to reboot to get it to stop. There are also people saying that being on wifi causes more drain. I thought this was not true for me, but I am rethinking. It may be higher when I am at home and on wifi.
djsbad said:
I've been one of the people complaining about battery life. In the first week or so that I had my phone, battery life was miserable. I need to be completely honest here though. After getting into my second week of using this phone, my battery life has greatly improved. In my honest opinion, I think it needs about a good week to 'settle' or 'break in'. I've done nothing different done I set my phone up and I have deleted any apps or anything. I don't know if this is the case for anyone else or not.
Click to expand...
Click to collapse
Smithfolk4 said:
I like the phone a lot. It is fast and everything works well.
The only things that I want improved are
1) Screen brightness adjustment. Too dark in dimly lit areas and too bright in normal room lighting.
2) Battery Life. This is a strange one. Some days I have really good life, but sometimes the standby use it high. Google Play Services sometimes eats a lot of battery. I have to reboot to get it to stop. There are also people saying that being on wifi causes more drain. I thought this was not true for me, but I am rethinking. It may be higher when I am at home and on wifi.
Click to expand...
Click to collapse
So far, I've yet to achieve substantial screen on time. It's really strange, I was having my phone used from 330 to 830 tonight, and it went from 100% to 45% with only 50 minutes of screen on time. WiFi and mobile data off, and I wasn't taking a lot of pictures.
One thing strikes me is the Held Awake/Doze clarified by GSam. That's eating the most battery, what exactly is it?
GigaSPX said:
So far, I've yet to achieve substantial screen on time. It's really strange, I was having my phone used from 330 to 830 tonight, and it went from 100% to 45% with only 50 minutes of screen on time. WiFi and mobile data off, and I wasn't taking a lot of pictures.
One thing strikes me is the Held Awake/Doze clarified by GSam. That's eating the most battery, what exactly is it?
Click to expand...
Click to collapse
Honestly, I'm not positive. Make sure in your display settings, though, that you have 'screen always on' turned off.
GigaSPX said:
So far, I've yet to achieve substantial screen on time. It's really strange, I was having my phone used from 330 to 830 tonight, and it went from 100% to 45% with only 50 minutes of screen on time. WiFi and mobile data off, and I wasn't taking a lot of pictures.
One thing strikes me is the Held Awake/Doze clarified by GSam. That's eating the most battery, what exactly is it?
Click to expand...
Click to collapse
I haven't been able to figure out why sometimes GSAM shows very little held awake with the phone deep sleep for a majority of the time and sometimes the held awake is almost the entire time since the phone has been unplugged. It seems that if the phone gets into the held awake state that you can get out of it by rebooting, at least it seems like that to me. I have not had enough time to come to firm conclusions on this. I am pretty sure that the held awake has something to do with Google Services or Play Services. It would be great if we can get root and limit the wakelocks from these. Just have to wait on that.
Pretty solid compared to the G4. No heating issues, battery lasts longer as well. I'm at 25%, 11h 7 min on battery 2hr 53min screen on time.
I average 14.5 hours total, 3.5 screen on time. I have noticed turning wifi off when I'm not using it saves a pretty decent amount of battery, which is odd.
I'm not upset with the battery life or anything, it's better than my S4 and G4 were, but if the S7 really lasts 7 hrs with screen on.... i don't know. I have another week to decide on restocking. I do love how quick it is, it's beautiful, feels great in the hand, and the option of removable battery.
I like this phone, and while it is better than the G4 in every way (very buggy, lag, missed taps, etc), I now get paranoid about any tiny bug on this thing and wonder if a Galaxy would be more reliable.
My first full charge I got 45 hours of battery life with 4 hours of screen on time. However that was before I had all my apps reinstalled and that 48 hours with 4 hours SOT included reinstalling all of my apps. Screen brightness on auto the entire time.
Since then I've only been getting 4 hours of SOT with 24 hours battery life. That's only 4 - 6 hours more of total time on an no more SOT than what my 2 year old LG G3 was getting.
LG skimping on the battery was a mistake.

Battery life greatly getting worse

Has anyone noticed their battery getting incredibly worse over time? I bought my S7 on release (non edge). And since then, I've noticed that it doesn't last no where near as long. Today, for example I started my day at 7:00am when the battery was 100%. As of 30 minutes ago, the battery reached critically low (5%). From 7am all I did was watch a few videos, facebook, snapchat and then play music. But all the above for not too long.
I've also noticed that once the phone hits the 15% battery (I know due to the notification), that within minutes the battery can be done to 10% or so, without touching it.
I'm more so tempted just to take it back, unless there's an easy fix OR it's a known issue with the current version.
Thanks!
xxshabsxx said:
Has anyone noticed their battery getting incredibly worse over time? I bought my S7 on release (non edge). And since then, I've noticed that it doesn't last no where near as long. Today, for example I started my day at 7:00am when the battery was 100%. As of 30 minutes ago, the battery reached critically low (5%). From 7am all I did was watch a few videos, facebook, snapchat and then play music. But all the above for not too long.
I've also noticed that once the phone hits the 15% battery (I know due to the notification), that within minutes the battery can be done to 10% or so, without touching it.
I'm more so tempted just to take it back, unless there's an easy fix OR it's a known issue with the current version.
Thanks!
Click to expand...
Click to collapse
I've definitely noticed this since rooting. Maybe it has something to do with that? Like a ROM you flashed or what not? I'd like some suggestions here as well.
Thanks!
musashiasano said:
I've definitely noticed this since rooting. Maybe it has something to do with that? Like a ROM you flashed or what not? I'd like some suggestions here as well.
Thanks!
Click to expand...
Click to collapse
I haven't rooted the S7, it was the first phone that I've left stock from opening.
What does the battery stats say is using the most mAh?
Facebook app is a known battery hog
Obviously over time, you'll install different things, and slowly the phone will start using more and more power running background apps
A backup and Factory reset will show if there is a hardware / battery issue, or if it's purely from stuff you've installed over time
Also clearing the caches from recovery could help
yeah ive noticed this too. My usage habits havent changed but my battery life is almost half of what it was when i just got the phone.
*Detection* said:
What does the battery stats say is using the most mAh?
Facebook app is a known battery hog
Obviously over time, you'll install different things, and slowly the phone will start using more and more power running background apps
A backup and Factory reset will show if there is a hardware / battery issue, or if it's purely from stuff you've installed over time
Also clearing the caches from recovery could help
Click to expand...
Click to collapse
Cache has been cleared from recovery, and I don't generally install many apps so since I've bought the phone the apps have stayed the same.
Android system is always on top. Unless of course I spend hours on Facebook.
Might have to factory reset. I've used my phone with the same apps and time since I've bought it, and I'm finding I'm charging it 3x as much.
I think it's a root issue - deep sleep.
After S6 Edge Plus, when you root a samsung phone, it won't go in deep sleep. I believe there's a fix for that.
Have you checked the battery usage stats? It gives you the breakdown on what apps are eating up the battery.
I have had my S7 for about a month and battery is about the same.
Just to update this thread for those that may have a similar issue...the other day I couldn't live with the battery life the way it was. The phone used 50% in several hours where I barely used it.
Decided to completely re-flash with stock (was stock before) as opposed to simply wiping all data. A week in, and the phone's battery life is back to the way it was. I went to bed when it was on 100% (as a test) and woke up 7 hours later with the phone on 94%, with wifi, location and bluetooth on.
Not sure what had caused it to use so much battery previously, but it's back to what it should be and that's all that matters.
hi with my s7 exynos i do 3h screen. i think there is a problem. i bought my s7 one week ago. can anyone help me?
Rooting and installing custom kernels when done right should greatly increase the battery life of your device. This is a well known guide here on XDA for improving battery life for our devices.
That being said, Lithium Ion Batteries hold less charge the more cycles they are put through, its a given fact but as you said your device is relatively new and therefore should not be experiencing this kind of problem. The way I see this is there are 3 possibilities which may be causing the said problem...
1) You have rooted the device and done some modification/s. ( which you haven't done )
2) Your battery is being drained by a service ( Like Oculus or VR ) in fact a number of reddit users complained their S7 was overheating and battery was draining really fast for some reason. Check This page out, It might help you.
3) Battery Defect, you must've gotten a "bad" model, if you haven't tripped KNOX you could try bringing your phone to Samsung and see if they would fix or replace it.
Good luck
I think this has to due to them samsung updates. As far as i know samsung been always doing things like this where they made the OS slow as hell after a while so you gonna get a upgrade sooner but a battery should last 2 years minimal without degrading.
---------- Post added at 03:36 AM ---------- Previous post was at 03:34 AM ----------
petmike2 said:
hi with my s7 exynos i do 3h screen. i think there is a problem. i bought my s7 one week ago. can anyone help me?
Click to expand...
Click to collapse
i get like 5 hours screen on time and bout 1 day standby time but i have most bloatware disabled with the package disabler. But if i was you i would contact samsung.
This happens with Samsung updates on every Galaxy phone. It's like a curse. It's unavoidable.
Enviado desde mi SM-G920F mediante Tapatalk
May i ask if the people with these problems use the fast charge? I hearing many bad things bout this so i switched it off and must say the normal charge isn't that slow and if it can keep the battery good for longer then we all should use this.
I turned fast charge off about a week after I got the phone, was making the phone and charger pretty hot for the sake of about 5-10 mins quicker charge
Pointless really, unless you are desperate, only have a few mins spare and need as much power as possible in that short time, and if that's the case, enable it for that one time
Restrict background data on all but the most important apps (phone, text, email), dave power all but the most important apps. Battery life is fine
Sent from my SM-G935T using XDA Free mobile app

Android System taking all of my battery!

I have a Galaxy s7 and I have been using it for quite some time now , I was getting a pretty good battery timings but one day I accidentally slept on my phone and when I woke up I felt that the phone was pretty hot (I didn't bother) and I slept again.
But after that incident the "android system" started taking all of my juice like 60-65% consumption or even 95% (sometimes) which used to make my phone get really hot! (Around 1000+ mAh) I was getting hardly 2 - 2.30 SOT
I was very frustrated so I changed the battery but the issue still persists ,the consumption is a bit better like 40-45% but the issue still persists ! My phone is not rooted and I don't use many apps either. I am not very technically sound but I need help! I couldn't think of a better platform. I would be very grateful

Rooted G Flex-2 H955 is draining battery very fast. Any idea why?

Hi,
Previously I successfully rooted LS966 and bricked while flashing ROM (Lesson Learnt) and paid a bomb to repair the motherboard.
I now have H955 - 15B. I successfully rooted the phone via online remote connect help, because I felt it would be cheaper than last time. After rooting,
Debloated mostly all google Bloatware and few system apps based on a list from another discussion on XDA,
Installed Pimp My CPU and reduced to 1230 Mhz
Doze to block background data traffic
Greenify to stop background processes.
This has been quite a versatile combination for me and the battery doesn't drop by even 1% until the screen is on.
Once the screen is on I am losing 1% of battery every 3 - 5 mins.
I am getting a Screen On Time of 3Hrs.45Mins only.
I have also read up on Battery Calibration issue and this is my second full charge - full discharge cycle.
But the battery percentages are still going down at the same speed.
My screen is drinking above 50% of my juice at 100% brightness. I tried to change that few times but it is more or less same.
Earlier it used to be around 15 to 30%. I am attaching current consumption picture.
While I am enjoying a good Stand By Time of upto 12 to 14 hrs, my Screen on Time is reduced to 3hrs 45Mins.
Is this normal?
Or I am missing something?
Is it the way ROM was flashed on old built before rooting because of soft brick while rooting?
Any indication will be of immense help. Many
Many Thanks.
Seems the way it should be. Changed my battery almost a week ago and I get maybe close to 4 hours of SOT, depends how you use your phone, I use it at 80% brightness though and standby time while it's just sitting on the table is days. :good: N.B. Using android 6.0.1, although it used to be pretty much the same on 5.1.1, maybe less standby time.
Also I'm pretty sure Pimp My CPU shouldn't be compatible with this phone because of the kernel and lockdowns. Maybe they've found some kind of loophole, doubt it though.
Also for the battery calibration, I fully discharge every month to 0% and then charge it to 100% while not using it and once it hits 100% it's good to go. Just the way I do it, not everyone does it the same.
Also, I never trust remote help of any kind, who knows what crap they might do, and even though I am an amateur at android rooting and flashing, I've done it myself every time cause I don't trust remote stuff.
And depending if you want root or not, you could use android 5.1.1 15c(although I don't know if the difference between 15b and 15c is that big) with root or android 6.0.1 20c without root. It's rather simple to root on 5.1.1 though, so many guides here, as long as you follow them to the letter.
You don't have to agree with what I've written here, it's just my opinion.
Azure Potato said:
Seems the way it should be. Changed my battery almost a week ago and I get maybe close to 4 hours of SOT, depends how you use your phone, I use it at 80% brightness though and standby time while it's just sitting on the table is days. :good: N.B. Using android 6.0.1, although it used to be pretty much the same on 5.1.1, maybe less standby time.
Also I'm pretty sure Pimp My CPU shouldn't be compatible with this phone because of the kernel and lockdowns. Maybe they've found some kind of loophole, doubt it though.
Also for the battery calibration, I fully discharge every month to 0% and then charge it to 100% while not using it and once it hits 100% it's good to go. Just the way I do it, not everyone does it the same.
You don't have to agree with what I've written here, it's just my opinion.
Click to expand...
Click to collapse
Are you sure you get close to 4Hrs of SOT on a brand new battery because I get 3 Hrs and 50 Mins or so but less than 4 Hrs on a phone which is 6 months old. Never changed the battery. If that is the case then I think I am doing alright. I have seen SOT Tests of phones like Pixel and One Plus T.
I dnt think pimp my ROM has any restrictions. It kind of works smoothly. It helps me cool down the hot CPU also. I have ovecome the dreaded overheating issues of G Flex 2 easily with clocking my CPU.
I have done the battery calibration. But it quite didn't help me.
I went paranoid because immediately after the root I started to observe the battery percentage on the top. And I felt its falling drastically. But on the other end my stand by time has gone upto 15 hrs. The battery doesn't drop even by a single percent until the screen is on. Once it is on it goes down drastically.
I think of the battery calibration as kind of a safeguard, it's not a necessity.
The pixel and oneplus are different beasts altogether.
Also, as your phone is only 6 months old then it's battery should be ok and as I stated before battery life depends how one uses their phone, I tend to play a few games here and there with 80% brightness and such so it takes a bit more on my end. I personally haven't seen over 4 hours of SOT with my phone ever since I've had it, but your mileage may vary.
As for the PIMP my CPU, if it works for you good, I personally moved over to 6.0.1. When I was changing my battery I removed the motherboard out of curiosity to see how the thermal pad is and only one edge was touching the frame, so I added some Arctic MX-4 thermal paste between the frame and thermal pad and the temps are surprisingly better now. Still tends to get hotter than it should but throttles a lot less now and the screen brightness doesn't forcibly drop below 80% now, even when gaming. It used to drop to 50% etc before when just browsing the web. Anyways, that's that.
It might be some background stuff eating your battery too if you had better battery life than you do now, or it might be because of the motherboard change. Unfortunately I'm not smart enough to say for sure. Also, the more you look at the battery percentage the worse it looks
Sincerely,
Azure Potato
Azure Potato said:
I think of the battery calibration as kind of a safeguard, it's not a necessity.
The pixel and oneplus are different beasts altogether.
Also, as your phone is only 6 months old then it's battery should be ok and as I stated before battery life depends how one uses their phone, I tend to play a few games here and there with 80% brightness and such so it takes a bit more on my end. I personally haven't seen over 4 hours of SOT with my phone ever since I've had it, but your mileage may vary.
Click to expand...
Click to collapse
Pixel is too expensive for me honestly and I am not really into expensive phones like iPhone or Pixel.
I am quite happy with G Flex 2's performance and I was only worried about SOT of 4 Hrs. I re calibrated battery and discharged and charged again 100% Thrice.
Somehow battery last over 15 hours after rooting. For example, its 3PM and I have 70% battery left even with SOT of 90 mins of movie. That is 1Hour30Mins.
And you're right, the more you look at battery. the more complicated it gets :laugh:
After rooting - Greenify + Pimp My ROM + Doze + Uninstall System Apps - combination is giving me 15 hrs of usage per day. It more or less includes phone calls, WiFi browsing, Network Data Browsing, Some videos and crazy amount of Twitter, all put together through out the day.
But I am still interested in SOT per single charge.
Interesting.... Same problem here
I'm on 20A, 6.0.1
You're sitting on about the expected SOT. I get anywhere from 4-5 hours and almost never take my brightness off 0%. I'm running a fully debloated 15c setup, same as yours except a version increment higher. The most intensive thing I do on here is install new apps, no gaming or anything. If you have the Facebook app, try switching to Facebook Lite which you can download off APK Mirror. Does everything the normal app does but without all the bloat, it's only a couple MB. Apart from all the tweaks you've already listed, there's not much else we can do. I've always wondered why screen takes the most battery usage by far, maybe it's just the screen type we have. Screen off is great, I lose less than 3% every night including background updates. Screen drains at about the same rate yours does.

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