Database Info

Cell Standby Battery Drain

I've searched about a million times in 900 different threads, but I still can't find a fix to this issue.
I first noticed this when I flashed MIUI onto my phone. I would get cell standby and cell idle at about 40-50% of battery usage each. Display wouldn't even be shown on the usage! I then figured MIUI wasn't worth it to me, so I flashed CM7. I tried both morfic's and faux's many kernels, nothing seemed to fix the issue. If I would turn the airplane mode on, I'd get battery drain of only like 2%/hour.
So I figured there was something wrong with the CM7 port, so I tried g2xtreme and other GB ROMs, same thing. Finally, I just checked a froyo ROM, same thing again!
So at this point I'm clueless and thinking the phone is completely a POS, but anyways. I'm about to nandroid restore stock 2.2 firmware, and try updating through the LG Mobile Support Tool.
But I have my doubts that this will fix it. I'm curious though if maybe I'm getting this drain because I'm with WIND Mobile in Canada? And this is for the T-Mobile G2X (they're the same phone and both companies use the same radio frequencies). But maybe there's something written in these ROMs to tell the phone to look for the T-Mobile network? Which I obviously won't be able to find in Canada.
Can someone help me locate these settings, if they exist? Or can someone with a Wind phone maybe toss me the WIND stock firmware? Or let me know what ROM they're using without said issue?
Thanks guys!
Edit:: In low signal areas the phone drains like 15-20% per hour, in high signal areas the phone is still pulling like 8%-10% an hour and I'm not even using it! And the weird thing is it only shows 1% time without signal! Something is seriously wrong with this firmware.

Search for betterbatterystats on XDA, install it, enable battery monitoring in MIUI (if that's your daily rom), leave your phone alone for a few hours, then open BBS and look at the partial wakelocks under "since unplugged." There you'll see what's killing your battery.
Everyone experiences worse battery life when reception is bad, but you are still getting terrible drainage in good areas, which means there's something other than reception killing your battery.

erikikaz said:
Search for betterbatterystats on XDA, install it, enable battery monitoring in MIUI (if that's your daily rom), leave your phone alone for a few hours, then open BBS and look at the partial wakelocks under "since unplugged." There you'll see what's killing your battery.
Everyone experiences worse battery life when reception is bad, but you are still getting terrible drainage in good areas, which means there's something other than reception killing your battery.
Click to expand...
Click to collapse
I tried that before, and had a crapload of apps "frozen" with titanium backup.
I'm going to try this again, and I'll post a screenshot this time because I don't think I actually understood what betterbattery stats was trying to tell me last time.
If anyone can help me decode it later that would be great!

Just noticed that there's barely anything under partial wakelock that's noticeable.. RIJL Telephony is the highest with 1m 1s 15%.
But it's not increasing very much, only when I get a text message. However, I've dropped about 7% since my last message, and cell standby is increasing climbing up my battery usage from 33% to 42%. It went from 620uah to 657uah.
Edit:: I reset battery stats cause I was unsure if it was corrupted stats. I started at 17% 40 minutes later I'm at 12%. Phone was off 90% of the time. I made a 2.5 minute call and it used 41uah, while cell standby still dominated with 65uah.
However, I turned my phone on for 5 minutes, making total usage 45 minutes, but had the brightness set to max, and in that five minutes it only used 1uah.
Am I missing something here? At this point I don't know if my numbers are normal or not anymore... I'm going to try draining the battery, charging to full, wiping battery stats, and calibrating and see what happens but 65uah to 1uah is a huge difference, I would've thought display would use a bit more than that.

I noticed this morning that having the phone with airplane mode OFF, that my battery dropped 10% in 57 minutes, and after turning the airplane mode ON, the battery dropped 1% in the next hour and 30 minutes. I checked battery stats and nothing was waking up my phone. Anyone have any other suggestions?
I'm going to flash miui and leave it without any apps installed then try this experiment again.
Sent from my Flashback HC-TAB using XDA Forum App

I find these threads interesting because I am always looking for better battery life.
I am running EB 2.3.3
I uninstalled Set CPU and uninstalled Juice Defender. From my experience both hurt my battery life.
I never bothered to measure in airplane mode, because i use my phone to much.
My battery life improved dramatically during stand-by. 1% to 2% drop per hour with wifi on and a slightly bigger drop with wifi off.
I completely wiped the phone before installing EB and the used Titanium Backup to reinstall my apps without the data. I believe some of my previous battery life issues came from restoring data from certain apps.

I have the same phone/carrier. Do you leave 3G turned on? I feel it rapes my battery throughout the day. When I turned it off, it lasts pretty long.
Another problem I have though, is the drain when it is OFF. I went to bed with it at 90% juice and turned it off. I woke up 8 hours later, and it was at 65% when I turned it on. wtf. This only happens sometimes thou.. Other times it doesn't drop too much.

aceofserenity said:
I have the same phone/carrier. Do you leave 3G turned on? I feel it rapes my battery throughout the day. When I turned it off, it lasts pretty long.
Another problem I have though, is the drain when it is OFF. I went to bed with it at 90% juice and turned it off. I woke up 8 hours later, and it was at 65% when I turned it on. wtf. This only happens sometimes thou.. Other times it doesn't drop too much.
Click to expand...
Click to collapse
I experience the exact same issue. But for some reason my battery life is more or less the same with 3g off. So I feel like my phone is constantly searching for a different signal or something? I mean if airplane mode affects my battery life that drastically reducing consumption by like 9%/hour then there must be something up
Sent from my LG-P999

Everyone who's been telling my phone is not sleeping is correct.
Only program is is that my phone's battery stats doesn't say which app is waking the phone? It lists Telephony as #1 with 1m 1s of awake time, and everything else is minuscule. There's gotta be something the phone isn't telling me :S Could it possibly be a hardware issue?
Or is there a better way I can narrow down this issue? I'm in the process of removing all apps.

Just curious, did you 'train' your battery?

aceofserenity said:
Just curious, did you 'train' your battery?
Click to expand...
Click to collapse
Nope, but it's Li-Ion and my impression was these do not need to be trained.
I just emptied it to complete 0 yesterday, and charged it to complete 100% then calibrated it. Today though it was still horrible battery life until I completely wiped and flashed MIUI 1.9.23 then Trinity kernel brand new. I'm installing apps 1 by 1 to see which one caused me so much darn grief :S

All batteries are Li-ion nowadays, but I still feel after 'training' my battery for a week, they last substantially longer than new ones, fresh out the plastic.

aceofserenity said:
All batteries are Li-ion nowadays, but I still feel after 'training' my battery for a week, they last substantially longer than new ones, fresh out the plastic.
Click to expand...
Click to collapse
I did end up conditioning it, not sure if it helped or if it was cause I flashed a new rom, but everything is finally working in order now
Sent from my Flashback HC-TAB using XDA Forum App

Battery drain fixed?

aceofserenity said:
Battery drain fixed?
Click to expand...
Click to collapse
Yes, battery drain is fixed. Also, I was on a completely different baseband for some reason, I was on the o2x baseband, fixed that JUST now, I think that was a part of the reason I was draining my battery like instantly. It was probably looking for a GSM signal!
Thank you for all your help

A simple *#*#4636#*#* can change that.

aceofserenity said:
A simple *#*#4636#*#* can change that.
Click to expand...
Click to collapse
Yeah I set it to WCDMA Only. Battery life has been awesome lately.

[Q] Bad Battery, Send to HTC?

Hi everyone.
Recently, in the past 2-3 months, I've had MAJOR problems with my battery, i.e.. unreasonable battery drain.
I used to get very decent battery life with my HTC One X, especially when using Sense ICS ROMs.
Since early this year, however, I've experiences severe battery problems.
The most troubling thing however, is the battery drain with Airplane Mode ON. It used to be (and with every other phone I've owned), if Airplane Mode was ON, battery drain was VERY low, even when playing music or something. And in deep sleep, there should be very very little battery drain.
However now, even when turning Airplane Mode ON, the battery still drains considerably – like 0.75 - 1 % an hour. And this is with the phone in deep sleep (I checked).
And with Airplane Mode OFF, the battery drain is really bad. I get great LTE/HSPA+ coverage in my house, usually a full 3/4 bars. But if I go to sleep with the phone at 80% battery, in 8 hours it will have dropped to at least 65% (Sense ROM with no apps installed).
PICTURES!
I ATTACHED SOME PICTURES
The first 3 pictures are old, with reasonable battery drain. These are with lots of apps installed.
The last 4 pictures are new, with bad battery drain. These are with NO apps installed.
As you can see, in the old pictures, with Airplane Mode ON, there is VERY little battery drain, both on Sense and AOSP ROMs. And even with Airplane Mode OFF, battery drain is much less on older pictures.
Compare for yourself.
And let me say that this problem is apparent in ALL ROMs, ALL configurations, ALL setups, ALL RUUs, ALL radios, etc... You get the point.
Actually, the majority of the 'testing' that I've done has been with fresh, clean ROM installs. Either AOSP ROMs with only Gapps installed, or Sense ROMs with NO third-party apps installed, and only Google Account signed-in.
Some configurations I've tried:
1.73 RUU, stock, no apps installed
2.20 RUU, stock, no apps installed
3.18 RUU, stock, no apps installed
Custom Sense JB ROMs, stock, no apps installed
ALL AOSP-based ROMs, stock, no apps installed
ETC...
Currently, I have no idea how to solve this problem, and am very sure that it did not exist in the past (started a few months ago). I've done nearly everything I can, even tried changing the outlet I use to charge my phone. And yes, I use the default, included white HTC charger.
My only option I see is to pack the phone up and return it to HTC under warranty and have them replace the battery. There is no water damage BTW (I checked the strip inside the SIM tray). And virtually now physical damage to the device.
This HOX is my 3rd replacement, the original was bought on May 6.
Does the warranty end 1 year after the original device purchase, or the purchase of the final device? ( I got the third one some time in June ).
But just to be safe, I need to ship it back to the before next Monday.
And lastly, I have:
S-OFF, bootloader unlock, SuperCID
In order to return the phone, I have RUU'd to 3.18 (so it looks authentic), and I will probably relock the bootloader, but leave it S-OFF.
I know you can modify the text in the bootloader to make it appear FULLY unmodified, so I might do that also.
SOOOOOO....
Any advice, precautions, etc? Especially for sending it to HTC?
Insurance, how to deal with HTC, how to convince them to replace my battery?
Any advice as to what might be butchering my battery? Seems that since I've tried virtually every software option, the hardware is the problem...
HOWEVER, could S-OFF be the problem? I S-OFF'd the device around the same time that I started having battery troubles, so could that SOMEHOW be the culprit? I don't know...
Is my battery actually looks bad, or is my perception just really screwed up?
Help? Please?

Your battery drain doesn't sound that bad to me. Batteries wear out over time and don't hold the same charge they used to. 1% per hour hardly seems like anything to complain about.
I doubt you're going to get a warranty repair for something like this.

iElvis said:
Your battery drain doesn't sound that bad to me. Batteries wear out over time and don't hold the same charge they used to. 1% per hour hardly seems like anything to complain about.
I doubt you're going to get a warranty repair for something like this.
Click to expand...
Click to collapse
I'm getting around 2-3% battery drain per hour, if I just let the phone sit there. And in Airplane Mode, it's just as bad.
Trust me, I've noticed a definite decrease in battery life compared to just a few months ago.
I'll also have some overheating problems with light usage on Sense JB ROMs (including the 3.18 RUU stock), so I think that might be contributing somewhat.
But I've been meaning to make a post about this for weeks, and in the meantime trying to ignore this problem and fix it. But it just isn't happening.
What kind of battery drain do you get with Airplane Mode ON?
Compare the drain in the old (1st picture) vs new (5th picture) when Airplane Mode is ON.

That drain doesn't sound bad to me at all, that sounds completely normal.

Really?
Well, on AOSP 4.2.2 ROMs, with Airplane Mode ON, AutoSync OFF, and no apps installed, and no wakelock, I get around 3% battery drain per hour. Probably due to bad power management in the ROMs themselves.
On Sense ROMs (and this is much worse on JB than ICS) , with Airplane Mode ON, AutoSync OFF, no apps installed, and no wakelock, I get around 1% battery drain per hour.
And all of the screenshots are with no apps installed/no syncing. With apps installed and syncing, the battery life is much worse obviously.
I don't know, I've just REALLY felt like there's been a definite decrease in battery life over the past few months.
I know for sure it used to be a lot better.
I understand that batteries wear out over time, but should it be happening this early to me?
I have an original, launch day HOX, that can handle the lowest underclocking (the processor is in 'FAST' mode), although I have experienced lots of overheating in the past during just very light usage.
Could you guys share the kind of battery drain you get with Airplane Mode ON? Over the course of an hour or few?

I never use airplane mode so I can't shed any light on that. You did say that you've experienced overheating, and overheating causes battery life to decrease both in the short term and the long term. It's the arch nemesis of the battery you might say.
Sent from my One XL using XDA Premium

Hydromea said:
.
Could you guys share the kind of battery drain you get with Airplane Mode ON? Over the course of an hour or few?
Click to expand...
Click to collapse
Well I did not use airplane mode. However, I turned off WiFi mobile data. Also lowered my brightness to then lowest setting. I have plenty of apps and probably some wake locks. I did this at 11pm and 60%. I have an alarm set for 730am. When I woke up it was at 54%. So you could possibly have a bad battery. My phone is a refurbished one so I don't known when it was manufactured
Sent from my Carbon-ize Evita using xda-developers app

I never use airplane mode unless I'm actually on an airplane, but I generally get around 2-4% drain per hour with normal use.

Just out of curiosity have you tried Greenifying Maps, Gmail, Facebook, etc, anything that syncs? Just this has brought my battery from 8hour to 15 hour usage. Has your carrier recently added LTE? LTE is a huge battery drainer.
Secondly, while I'm not discouraging sending your phone in. I doubt they'll do anything. Batteries deteriorate over time. It's a well known fact and companies will rarely replace them unless it's DRASTIC, 2 hour battery life for example or phone no longer turns on.

exad said:
Just out of curiosity have you tried Greenifying Maps, Gmail, Facebook, etc, anything that syncs? Just this has brought my battery from 8hour to 15 hour usage. Has your carrier recently added LTE? LTE is a huge battery drainer.
Secondly, while I'm not discouraging sending your phone in. I doubt they'll do anything. Batteries deteriorate over time. It's a well known fact and companies will rarely replace them unless it's DRASTIC, 2 hour battery life for example or phone no longer turns on.
Click to expand...
Click to collapse
Yes, I have tried Greenifying apps, but the battery problem persists even when no syncing apps are installed/autosync is off.
And LTE shouldn't cause problems with battery drain during Airplane Mode. But regardless I have always had good LTE service in my area, so I don't think that's the problem.
If I DO send my phone in, could they just refuse to replace the battery and send it back? Or will they tell me they won't replace it before I send the phone in? What is the process for sending a phone to HTC?

Call them. They're good about explaining what will happen. They'll usually tell you then and there if it's covered. If they won't cover it, they will usually contact you and let you choose if you want them to fix it for a cost or send it back.
Keep us posted as to what happens.
Sent from my One X using xda app-developers app

Ok, so I called HTC today.
The guy on the phone was pretty helpful and nice. I simply explained that I've been experiencing much higher battery drainage than before, how the battery would drain a lot even on airplane mode, overheating problems, etc. Also mentioned that I had tried factory resetting/running without any apps and nothing had helped. I said that I had read that since the battery is not user-replacable, HTC would replace the battery for free. The guy also asked me how long my battery lasted. I gave him some stats like, "With data on and no syncing, around 2-3% per hour" or "With airplane mode on and in standby mode, around 1% per hour" but he kept asking me, "How long does your battery last?" He told me to just tell him a certain number of hours, so I said "10-12 hours with 40 min screen time". That finally stopped him asking. He read me their policy, and asked my information about my address and email, etc. And then it was done.
Also, he used my IMEI to check my warranty status, and apparently the fact that I bootloader unlocked my device raised no concern or mention. :good:
Pretty simple, just keep your cool and keep it simple.
Basically, just tell them the battery life has been really bad, and that you want it repaired. Tell them about how long the battery will last (in hours) and give an approximate screen-on time. Don't worry about fancy stats or figures.
Of course, now I have to actually send the phone back, which is supposed to take around 10 days to repair and return.
Any advice on how to cover up my tracks of S-OFF, unlock, supercid, etc?
I don't want to raise any suspicion, but I also want to be able to re-unlock my device if they ever RUU it. I'm already running the 3.18 RUU by the way.

Hydromea said:
Ok, so I called HTC today.
The guy on the phone was pretty helpful and nice. I simply explained that I've been experiencing much higher battery drainage than before, how the battery would drain a lot even on airplane mode, overheating problems, etc. Also mentioned that I had tried factory resetting/running without any apps and nothing had helped. I said that I had read that since the battery is not user-replacable, HTC would replace the battery for free. The guy also asked me how long my battery lasted. I gave him some stats like, "With data on and no syncing, around 2-3% per hour" or "With airplane mode on and in standby mode, around 1% per hour" but he kept asking me, "How long does your battery last?" He told me to just tell him a certain number of hours, so I said "10-12 hours with 40 min screen time". That finally stopped him asking. He read me their policy, and asked my information about my address and email, etc. And then it was done.
Also, he used my IMEI to check my warranty status, and apparently the fact that I bootloader unlocked my device raised no concern or mention. :good:
Pretty simple, just keep your cool and keep it simple.
Basically, just tell them the battery life has been really bad, and that you want it repaired. Tell them about how long the battery will last (in hours) and give an approximate screen-on time. Don't worry about fancy stats or figures.
Of course, now I have to actually send the phone back, which is supposed to take around 10 days to repair and return.
Any advice on how to cover up my tracks of S-OFF, unlock, supercid, etc?
I don't want to raise any suspicion, but I also want to be able to re-unlock my device if they ever RUU it. I'm already running the 3.18 RUU by the way.
Click to expand...
Click to collapse
I would just leave it at the 3.18 RUU with S-OFF if it was me. You could technically flash a modified HBOOT, but if they really cared that much, I'm sure they could tell your bootloader is unlocked regardless since your IMEI is surely captured when you unlock via HTCDEV.

[Q] Battery Problens!!

Ive had my htc one x for maybe 5-6 months which is almost the longest ive ever been on one phone and i love(d) it, but its always been doing something very strange and aggravating that seems to be getting worse. Battery drain has always been a problem for me with this phone but ehh i can deal with it, but once my phone gets down to about 14% which is does often because of the draining it starts acting real funny with its power and sometimes goes from 14 down to 5 in an instant literally out of no where and as soon as i plug up itll go right back to 13, or itll shut down entirely at 14% but i can just cut it back on, or itll shut down in the middle of me doing something and i have to charge it for about 5-10 minutes before itll even come back on. The latter happened last night btw. No matter what combination of roms/kernels i try this always seems to be a problem. I really cant deal with this anymore and its to the point where i wanna throw my phone into a wall and just buy another one, which im seriously thinking about doing at this point. If such thing has happened to anyone before or you have insight on this can you please help before i just give up hope completely.

What you have described is normal for our device. Remember that the battery percentage is just an estimate of your actual charge. In addition, you find your phone shutting off around the lower percentages as a result of the device attempting to prevent damage to the battery. That is what the HOXl was designed to do.
Sent from my One X using XDA Premium 4 mobile app

KungFuCracka94 said:
What you have described is normal for our device. Remember that the battery percentage is just an estimate of your actual charge. In addition, you find your phone shutting off around the lower percentages as a result of the device attempting to prevent damage to the battery. That is what the HOXl was designed to do.
Sent from my One X using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Last night when it did it, as it has before, i was still on 21%.... thats not normal. And this isnt my first android nor first htc, never happened before. Even on my aunts old one s it didnt happen

Do you allow full charges after these "forced shutdowns" occur? This should cause your battery to recalibrate.
Sent from my One X using XDA Premium 4 mobile app

NexusS4gFreak said:
Last night when it did it, as it has before, i was still on 21%.... thats not normal. And this isnt my first android nor first htc, never happened before. Even on my aunts old one s it didnt happen
Click to expand...
Click to collapse
The battery behavior on this phone has been interesting. I have the battery last over two weeks on airplane mode and I've had the battery last just a couple of hours with just a stock setup. There are so many factors that play into this. I work in an area with very little to no signal reception and my battery life goes crazy and the phone can get really hot while I'm there so I've seen the best and worst.
What I do to counteract this bad behavior:
1. Charge prior to 40% (I've had the phone go from 40% to zero instantly before)
2. Consider your signal reception and either try out different radios or use airplane mode to reduce erratic battery drain
3. Install a 3rd party app like batterycalibration (https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=en) and use that when things get hairy (I calibrate every two weeks or so and that does the trick for me.
My phone has been like this since I pulled it out of the box. With a little management, it is just fine. You have seen it before but I'll say it again, you have to get through a few charge cycles when flashing a new Rom to get back to normal.
Hope this helps. It works for me and I work in a cell phone reception hell.

NexusS4gFreak said:
Ive had my htc one x for maybe 5-6 months which is almost the longest ive ever been on one phone and i love(d) it, but its always been doing something very strange and aggravating that seems to be getting worse. Battery drain has always been a problem for me with this phone but ehh i can deal with it, but once my phone gets down to about 14% which is does often because of the draining it starts acting real funny with its power and sometimes goes from 14 down to 5 in an instant literally out of no where and as soon as i plug up itll go right back to 13, or itll shut down entirely at 14% but i can just cut it back on, or itll shut down in the middle of me doing something and i have to charge it for about 5-10 minutes before itll even come back on. The latter happened last night btw. No matter what combination of roms/kernels i try this always seems to be a problem. I really cant deal with this anymore and its to the point where i wanna throw my phone into a wall and just buy another one, which im seriously thinking about doing at this point. If such thing has happened to anyone before or you have insight on this can you please help before i just give up hope completely.
Click to expand...
Click to collapse
When a new ROM or kernel is flashed you need to let battery settle for at least 48hrs before you get super worried about battery. If possible during that time let device fully discharge then charge up to 100. Please use a battery monitoring app and then see what's causing the issues. With proper config hoxl will get good battery life. There is always the chance its hardware issue but doubtful as battery prolly would of completely failed by now. Also check your screen brightness settings. Hope this helps
Senseless Power Unlocked

For example
Senseless Power Unlocked

Madcat8686 said:
The battery behavior on this phone has been interesting. I have the battery last over two weeks on airplane mode and I've had the battery last just a couple of hours with just a stock setup. There are so many factors that play into this. I work in an area with very little to no signal reception and my battery life goes crazy and the phone can get really hot while I'm there so I've seen the best and worst.
What I do to counteract this bad behavior:
1. Charge prior to 40% (I've had the phone go from 40% to zero instantly before)
2. Consider your signal reception and either try out different radios or use airplane mode to reduce erratic battery drain
3. Install a 3rd party app like batterycalibration (https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=en) and use that when things get hairy (I calibrate every two weeks or so and that does the trick for me.
My phone has been like this since I pulled it out of the box. With a little management, it is just fine. You have seen it before but I'll say it again, you have to get through a few charge cycles when flashing a new Rom to get back to normal.
Hope this helps. It works for me and I work in a cell phone reception hell.
Click to expand...
Click to collapse
Ive done all three methods youve mentioned before and still same thing. Also im on 3/4 bars with lte 90% of the time so no reception issues here. And with my current setup ive been running it for about 2 weeks.

DESERT.TECH said:
When a new ROM or kernel is flashed you need to let battery settle for at least 48hrs before you get super worried about battery. If possible during that time let device fully discharge then charge up to 100. Please use a battery monitoring app and then see what's causing the issues. With proper config hoxl will get good battery life. There is always the chance its hardware issue but doubtful as battery prolly would of completely failed by now. Also check your screen brightness settings. Hope this helps
Senseless Power Unlocked
Click to expand...
Click to collapse
Ive always let the rom settle in and i constantly maintain the brightness on around mid level (mirror screen protector so i cant go too low) but its not just one rom or a few, its with every rom i flash ad that consists of most roms available for this device

The battery behaviour you described is completely normal if you understand how a battery of this type works, and if you understand how the software (especially the display of battery percentage) works in conjunction with it.
Sent from my Evita

timmaaa said:
The battery behaviour you described is completely normal if you understand how a battery of this type works, and if you understand how the software (especially the display of battery percentage) works in conjunction with it.
Sent from my Evita
Click to expand...
Click to collapse
So youre telling me having the phone get to 22% and instantly drop to zero and power down is normal? Makes no sense at all. Also i cant get it to charge too 100% for anything. So if theres no fix to this, anybody want a one x with a troublesome battery?

What I'm saying is the battery percentage displayed by the software is never exact, it's only an estimate based on the voltage level of your battery. Your battery sounds like its long term life (capacity) has been decreased over time and possibly bad treatment (allowing the device to discharge too much too many times).
Sent from my Evita

NexusS4gFreak said:
So youre telling me having the phone get to 22% and instantly drop to zero and power down is normal? Makes no sense at all.
Click to expand...
Click to collapse
Depends on what you define as "normal". Such behavior is certainly not unheard of (although you particular collection of symptoms may point to a more serious issue, which I'll get to later). Couple things you have to remember: the battery meter is far from accurate. Being off by 10% or more is not unusual (completely normal). So jumping from 5 to 13% as you mentioned is not out of the question. The battery voltage is not actually jumping around, just the % battery number that the phone is assigning to various voltage readings. Reading errors happen, and if a jump is noticed, its just the meter correcting itself.
Which brings us to the other point that should be kept in mind: the battery % is not a "real" measurement. Its just a number assigned to various voltages to give the average person a sense of how much battery is left. Its a completely fabricated and artificial measure that just gives some relative sense of when a user should charge their battery. Phone makers just decided to use a system that average people would understand, like the fuel gauge on a car. Zero doesn't really mean zero (or anywhere close), but reporting in voltages would make no sense for most folks. Also, as we all well know, just because (for example) it took you 12 hours to drain the phone to 50%, does not necessarily mean the phone will last another 12 hours to drain the remaining 50%. It all depends on what you are doing with the phone during that time. Which leaves the question: What does the % battery really mean? Really, not a heck of a lot.
On the other hand, the battery failing to charge to 100% is troublesome, as is the apparent frequency of the meter drops and the fact that the issue remains after various ROM flashes. Leads me to believe there may be some hardware issue going on.
The short answer: IMO while some of the individual symptoms are not unusual, the seeming frequency (you haven't exactly quantified this, but it seems relative frequent just based on your descriptions) may suggest a larger issue, but its not certain.

Thanks it explained a lot but it happened again today, went to the store with ~36% on the meter and walked out, haven't touched it at all, phone was completely dead. Tried to charge and it went to 6% and stopped charging, all signs showed it was charging but it was stuck on 6. Then it started climbing again and reached about 16% and actually started losing charge while on the charger. Switched over to my portable battery charger i just got and it held the charge at about 5% for ~30 minutes, which is what it was when i plugged it in and started to charge, then it stopped againand during the whole process the phone was getting very hot. Yea im getting a new phone :/

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

Battery draining insanely fast

Hi
All of a sudden my battery started draining rapidly. See the attached screenshots for ref. I thought maybe it was a software bug since it started happening 2 days ago. I tried booting into the safe mode and the fast drain didn't stop. I also did hard reset with same result. At this point I'm thinking about getting new battery. Just wanna see if xda community has any tips if maybe I've missed something. It's just strange that this sudden degradation happened overnight.

Obviously, that draining is not normal.
In the upper left corner there is a warning that some app is running in background.
When you did the hard reset also you did a restore from some backup? Is the device warm/hot?

Sometimes it shows carrier utility or people apps running in the background. I restored from Google backup (forgot to mention in the OP). Device isn't hot at all.

i stared clean with LeeDroid ROM (had original Sprint ROM on) after wiping the data and the fast battery drain remains. at this point i'm going to replace the batter since it's not a software issue.

I'd definitely say your battery has shat itself. I'd also try something like gsam or battery info in *#*#4636#*#* to see the health of your battery. I'd be interested to know if it reports it as "good" health

It's strange but the standby seems to be better now whereas it was going fast before. Thought maybe it 'fixed' itself, however during a phone call (4min) I lost %3. That's definitely not normal 4636 is not showing any battery info. Can't find anything in gsam showing health status of the battery. Is it in pro?

If the battery drains fast during calls can be due to poor/weak network reception (the modem tries to maintain the best quality and scans the network over and over).
3 sot with 50% (or little more) battery left is a good value, in my opinion.
Oh, when recoveries are made due to some problem is better to not restore from backups. In that backup can be the app or setting that is causing the problem.
Anyway, with the last google play services (14.7.99) I also have noticed a bit more drain during standby.

Sounds like you need to replace it

yaboc said:
Hi
All of a sudden my battery started draining rapidly. See the attached screenshots for ref. I thought maybe it was a software bug since it started happening 2 days ago. I tried booting into the safe mode and the fast drain didn't stop. I also did hard reset with same result. At this point I'm thinking about getting new battery. Just wanna see if xda community has any tips if maybe I've missed something. It's just strange that this sudden degradation happened overnight.
Click to expand...
Click to collapse
I have about the same issue. The battery is draining too fast and it's very noticeable when idle, even when idle in safe mode + airplane mode it loose 20% during an 7 to 8h night. I tried all htc nougat and oreo official and unofficial roms and nothing fixed the problem.
I also used the htc diagnostic tool to determine whether my battery is "good" or not and..... according to the diagnostic tool it is "good". Notice that according to diagnostic tool the battery is defective only if it goes from 100 to less than 75% during the test. Mine goes from 100 to 93 during the test which consists in showing a kind of dark grey screen at full brightness during 1 hour.
Even with a battery rated as good I decided to sent my device for repair because it was not good.
I received the device back and it has not been repaired because it passes the diagnosric tool test. test.
So i'll replace the battery myself as soon as i'll receive my new battery.
I suggest you to run the diagnostic tool test and if you get a decrease from 100 to less than 75, they should repair it under warranty, if not, suggest you to replace the battery yourself or pay somebody to do it for you.

deadlynounou said:
I received the device back and it has not been repaired because it passes the diagnosric tool test. test.
So i'll replace the battery myself as soon as i'll receive my new battery.
I suggest you to run the diagnostic tool test and if you get a decrease from 100 to less than 75, they should repair it under warranty, if not, suggest you to replace the battery yourself or pay somebody to do it for you.
Click to expand...
Click to collapse
I already ordered the battery and will do the replacement myself if the wait times are similar to those of screen replacements. Plus everything points to a bad battery so another test with official app is pointless. Sounds like we both will be doing the swap ourselves.

So I put new battery in and the drain seems slower than before and the charging is not erratic (jumping). When I was removing back cover the black layer came off so I figured it'd be good time to try clear cover mod . I like the look but unsure if anything will interfere with the radios and such due to the missing protection.