Battery drain and overheating - Galaxy S 4 Q&A, Help & Troubleshooting

hi, my new s4 i9500 temp rises to 53C when gaming or even using a lot of apps/browsing. i know that some encountered that issue but after trying everything i thought maybe it is the battery. on the back of the battery it states MADE AND ASSEMBLED IN CHINA. isn't the battery supposed to be manufactured in korea? my battery also have considerably short life. what do you think?
thanks,

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[Q][I9505] Heat and Battery issues - Return or Keep?

Dear Friends and Community,
I recently acquired the S4 with moderate excitement. I already had a S3 and I was very happy with it but I had the option to get an S4 after extending one of our contracts so I went for it and gave my S3 to my wife - she's very happy with it now But i am not very happy with my S4 for 2 reasons:
- Extensive heat generation (36-47C) while surfing, watching videos, natigating calling etc.
- The heat seems to originate from the top portion of the phone on the back as well as the front side around the camera. it is uncomfortable to hold it against my hear on call
- My S3 did not heat up this much or this often. I also did not have any battery charge cliffs or jumps with my S3.
- As the device heats up, the battery drains INSANELY fast. Also I've noticed a disruptive and sudden battery discharge. As I charged my device for the frist time to 100% moments later the battery level jumped from for example 95% to 82% in one second. Is this due to battery calibration issues (because the device is new and the battery has not been charged many times yet) or is this something that can be considered a hardware flaw of the battery or device? I could be watching a video at medium brightness and my battery would go down by 1% each 2 minutes.
Sometimes during use and especially when it heats up some percentages are skipped while discharging (95%, 93%, 89% without sequencing down one by one but rather as 'chunks' of battery loss. ) did you exhibit similar behavior on your phone? Are these battery 'jumps' tied to the heat development?
And now the main questions: Should I return the device and exchange it against a new one or should I wait until Rom development or a patch tackles the problem ? I've already installed a recent OTA from Samsung and hoped the problem would vanish but no luck.
I'd be thrilled to hear your Opinions.
Best,
Thomas
Ive also noticed heating up and fast battery discharge, not one full day of normal usage, my s3 lasted at least 2 times longer. i hope it will pass as i finish 3 times battery charge discharge. for now im excited with camera quality and benchmarks scores i love this phone already, its still plastic but i dont care, with every phone i use silicon or other cases, for s4 i bought original samsung case with plastic back rounded by rubber.
In few days if overheating and fast discharge will not pass on its own i will flash firmware again with kies (repeir mode) and reset all settings.
I also experienced the same issue, its getting hot not warm while doing normal tasks... Dear Thomas u have see temp. in between 37 to 47 but my phone heats upto 55c while gaming... now my phone is with samsung service center, but i am not sure they will replace it with new one as their policy allows replacement only within seven days from the date of purchase and i bought it 27th April itself, just next day of launch. Now i am thinking that why the hell i rushed to buy it. i should have waited for user reviews...
And BTW flashing original firmware doesn't help. Because people at service center had done that and given my cell back to me, but that issue was still there so submitted it again to the service center.....
Are you guys getting these temperature readings using e.g. Battery temperature reading of Cool Tool?
My battery temperature as reported by cool tool never got above 40C but it felt quite hot to the touch already And I am not using any case on it...
I have a case arround it. I will play some games later to see where the temp peaks. but I think it will also be around 50 because it already gets pretty warm doing basic stuff like watching videos or using viber to call.
It feels like this is a problem for all S4's out there.
Check out this video at min 3:25 http://www.youtube.com/watch?v=aUx40kXZF5s (Steep drops in battery)
I really don't want to send in my device for no reason because I will most probably get a refurb or even a device with more problems.
I just want to know if other people have experienced similar issue.
You can check with the app called BatteryGraph and see if sometimes a few percent are skipped down the graph.
It would be great if someone did this for me
Same here with the heat. I undervolted -37,5mV and underclocked 300MHz, now everything is fine
Benchmarkscores are a little worse, but tbh, I really don't care. No current app or game is gonna use it anyway. Seems like a waste of battery life to keep the 1,9GHz clock speed.
Did the same with the Galaxy S2 I owned, which became quite hot too. Samsung has a tendency to overclock their chips just to outperform every other phone on the market, but the truth is, there is virtually no benefit in keeping the maxed clock speed in everyday use, other than doing benchmarks all the time ...

[Q]My GT-I9505 has strange battery issue...

Hi.
My S4 has this issue of automatically shutting down when the battery is less than 50%, but sometimes it keeps working even on 2, 3 battery life???
is there any way to fix this battery or if i must buy a new battery for it which one to buy coz there are a lot of replicas and fake battery here in Pakistan...
Try a new battery.
Lennyz1988 said:
Try a new battery.
Click to expand...
Click to collapse
can you tell me which one to buy???
Doesn't really matter as long as it gives power and fits in your device.
HI,
Dont want to start new thread if problem is the same.
Is this the same battery behaving?
Why battery spikes, is it dead?
Battery can last whole day with wifi on, few hours of net, and few calls.
i have this issue too but sometimes it gives me more than 1 day timing

replacing battery to improve battery life

Has anyone tried to replace their batteries yet to see if they will get better battery life? I've had this phone since April or may and the battery life is just getting worse. Tried many factory resets and other fixes and they didn't do anything.
April is a very short period of time for replacing a battery, escepially for a high-end phone like a S7 Edge. It's probably your settings or apps, that are causing a battery drain.
19bjk03 said:
April is a very short period of time for replacing a battery, escepially for a high-end phone like a S7 Edge. It's probably your settings or apps, that are causing a battery drain.
Click to expand...
Click to collapse
Yeah that's what i was thinking too. Is there any other way to find out what's draining my battery without root?
Batteries dont die that fast, its definitely an app. These batteries usually last over a year before you start noticing degradation, unless its been through heavy abuse.
WingedCow said:
Batteries dont die that fast, its definitely an app. These batteries usually last over a year before you start noticing degradation, unless its been through heavy abuse.
Click to expand...
Click to collapse
Yeah that's why it's been so weird that I've been experiencing such terrible battery life especially after factory resetting. My android system is also not really high on my list anymore so I'm not sure if there's a problem with that.
Also didn't realize I posted this in the general s7 edge forum. I have a sd820 s7e.

My phone's battery gone from 70% to 5% after shutting off

This is super strange! I do not know why this happen!!
I turned off my phone at around 1:25PM, at that time there is about 70% on the battery. On 4:00PM, i turn it back on and found out there is only 5% on it!I then went to look at the battery usage and found a straight curve but no apps are using the battery serious.My phone is a Samsung galaxy j5 prime hong kong version with a 2600 mah battery. Also, this phone always have the thermal throttling issue but it was never solved.Please help, the phone is only one year old...

Battery question

So, I bought my S8 in March. Since now I've had lots of problems with the battery and I just asked Samsung to check it if there were any flaws. They swapped the logic board, but now (after 1.5~ months after the repair) I've got almost the same problem (it was very poor battery life with overheating issues reaching upto 45-50° without charging, now it's only very poor battery life). I checked with Phone Info my battery health and after ~100 cycles it's already at 88% of capacity. Is it normal, or should I just go and ask for a battery replacement?

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