Database Users

Battery seems to drain fast when 50% or less, is this normal?

When my phone is fully charged or has 70 or 60% remaining battery it seems to drain as normal, around 2-5% over a 10 hour or so period...
However, I've noticed once the battery decreases below 50% it drains FAST, why?
Anyone else noticed this? Test it for yourselves, monitor the TIME it takes to decrease from 100 to 50% and then from 50% to 0.
Yesterday I forgot my phone in the car whilst going to work. It was turned on however it was sitting all day in the car.
Once I returned from work I was shocked to find the phone would not turn on.
At first I thought there was a problem or some kind of fault. Once I plugged in the charger it started to charge, the battery cut and the phone automatically turned off!
I remember the phone had around 48% battery remaining, no wifi or 3g or data turned on. It was simply idling...
So the question is HOW can the battery drain from 48% to 0% over a 10 hour period without being used???
Should my battery of been ANYTHING over 50% it would only lose a few percent...

Same thing for me. (Samsung Galaxy Note N7000 - stock Android 2.3.6)
Battery slowly decreases from 100% to ~50% and then ~2x faster.
I charged the note on my computer and then switched to the charger (at ~60% of charge).
I'm no expert of battery charging etc. but just remembered my iPhone 3GS discharging faster when charged on the computer than with the charger.
If it's the same for the note, some cells could discharge faster because charged on the computer.
Can someone confirm this (or not) ?
How did you charge your phone ?

boubou2k said:
Same thing for me. (Samsung Galaxy Note N7000 - stock Android 2.3.6)
Battery slowly decreases from 100% to ~50% and then ~2x faster.
I charged the note on my computer and then switched to the charger (at ~60% of charge).
I'm no expert of battery charging etc. but just remembered my iPhone 3GS discharging faster when charged on the computer than with the charger.
If it's the same for the note, some cells could discharge faster because charged on the computer.
Can someone confirm this (or not) ?
How did you charge your phone ?
Click to expand...
Click to collapse
Same thing happnd with me, and charging my phone thru electric charger..

So it seems this behaviour happens to several other Note users, why?
It's a problem knowing that having around 50% left in your battery will struggle to make it through the day with little to no use...

Have you people set the wifi to turn of while the screen is off? This is unnoticeable in the daily use, but increase the batterytime massively. The setting for this is hidden, you have to push menubutton while in the wifi-settings.

Here I thought I was only imagining things about the battery life dropping faster once it has reached 49% or less.

EarlZ said:
Here I thought I was only imagining things about the battery life dropping faster once it has reached 49% or less.
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Click to collapse
Haha, nice to know I'm not the ONLY one facing this bug...
I can only hope Ice Cream Sandwich solves this battery drain issue.

Hmm, i think i have the same problem, but i'm not sure. Will get back to this thread when i've investigated a little bit.

This may be a typical samsung issue.
I remember when i had the spica , the battery percentage lining in kernel was totally wrong. I think its done on purpose so you would feel like you have more battery life. 75 % of the battery drains slow. And the rest 25 super fast. Can be fixed within kernel.
Sent from my LG-P990 using Tapatalk

I believe its just a placebo effect. Battery usage always depends on so many factors its a pain to even consider starting looking for the issue.
Being on stock KK5 not rooted, i cannot report the same. I only see "fast battery drain" at the last 4-5%. If you feel its an issue, could you post the firmware version you are on and the battery stats graph just for reference?

Placebo or not its something I can definitely feel on my Galaxy Note.

EarlZ said:
Placebo or not its something I can definitely feel on my Galaxy Note.
Click to expand...
Click to collapse
When you get the chance, could you post the battery stats graph please? what we should see is a (lets say) 30 degrees angle and at about halfway it gets steeper.
I know its quite hard to demonstrate the issue, but if you lets say use wifi to browse the first 50% in text only sites and then visit youtube for the last 50%, it won't help the test.
A nice way to test it would be to charge it to 100%, then load up a long movie and repeat playing it till the battery is 2-3%. Then post the results.

roxxy said:
Have you people set the wifi to turn of while the screen is off? This is unnoticeable in the daily use, but increase the batterytime massively. The setting for this is hidden, you have to push menubutton while in the wifi-settings.
Click to expand...
Click to collapse
When the Wifi is disconnected, the 3G scanning will get on. Isn't that defeating the purpose?
Sent from my GT-N7000 using Tapatalk

Hey there!
I would suggest to load the battery 100%, plug it out, go into recovery and wipe battery stats.
I have to admit that I don´t know exactly what this workaround does, but I read about it in another forum...and it worked for me, my battery status is much more accurate now!

JulyDerek said:
When the Wifi is disconnected, the 3G scanning will get on. Isn't that defeating the purpose?
Sent from my GT-N7000 using Tapatalk
Click to expand...
Click to collapse
Wifi will continue to scan for wlans near it every second or so
Sent from my GT-N7000 using Tapatalk

I'm back. I've had the Diagnosis app running for the past hour, and i got some interesting results.

---Wiping battery stats does not help---, a full charge automatically causes battery stats reset.
I full charged mine with the electric charger after fully discharging it without turning it on.
This time i didn't notice any change in discharge speed between 100%-50% and 50%-0%.
Last time I charged the phone it was not fully discharged. Charged it from 30% to 50% then 50% to 75% on the computer, and 75% to 100% using electric charger.
It's just a supposition, but maybe doing several partial charges while using the phone makes the battery % information inaccurate (wrong battery stats?).
[Edit]In this case, wiping battery stats should show accurate battery %. [/Edit]

I had a similar problem, and I think it is to do with some incorrect scaling or measurement.
I was down to 28%, and it seemed to be draining fast even though I was not using it. I rebooted (I love how quick that is after my Arc was so slow). On restart it was at 17% ! The usage graph just did an instant drop.
I also had another occasion where it remained at 100% for 2 1/5 hours of use.
I assume some calibration issues caused the meter to read the battery wrong. I am turning off on the w/e overnight (when I do not need the alarm) to see if a slow (180 mA) charge while off will help. I may even get a decent alarm clock so I can turn the phone off at nights and charge. I spend too much time in the morning checking my email and reading news!

What is more consistent on mine is that when the battery drops to 9% or less the loss is like 1% per ~10-15% and this is with wifi/3g off, phone locked.

I'm back again. I've had some serious battery drain the last couple of days, but i noticed that Auto Sync was enabled. Once i deactivated it it got much better. Pulled the phone from the charger 9 hours ago and i'm at 90% battery left. I've sent some SMS, a few calls and that's about it, but it doesn't drain while it's in standby now, so i'm happy with it.

[POLL] Average battery drain % per hour while idle

Just like the title says, I would like to know what is the average battery drain that you guys are getting on your S6 and S6E devices while leaving it on idle. My device is SM-920I and the battery drains about 0.7% on WiFi and 1.5% on 4G per hour. I understand that the mileage will vary depending on how many apps/radios you have installed/turned on, but would be interesting to know what everyone is getting as an average.

I'm running a fairly untouched version of clean rom. The only battery tweaking I'm done is having GPS only turn on for maps. About 1 to 2% an hour

Over night i am normally at 65%. When i wake up its at 64%..... all data,gps and sync are off. And on silent mode....

While phone in deep sleep, it drains 0% for 6H and 1% around 7-8H. All stock and no root.

dt33 said:
While phone in deep sleep, it drains 0% for 6H and 1% around 7-8H. All stock and no root.
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Click to collapse
The only way i can get this is to turn on Airplane mode. Otherwise it drains about 1% per hour.

Usually 5% overnight. 8 hours.
Everything on. Even gps

Dark5tar said:
The only way i can get this is to turn on Airplane mode. Otherwise it drains about 1% per hour.
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Click to collapse
Not for me and dont ask me why. I just dont know why this happens. Only thing I did, was boot into recovery mode and wipe cache.
https://lh6.googleusercontent.com/-.../Sslvnw4hq0M/w512-h910-no/gplus1559079390.png

dt33 said:
Not for me and dont ask me why. I just dont know why this happens. Only thing I did, was boot into recovery mode and wipe cache.
https://lh6.googleusercontent.com/-.../Sslvnw4hq0M/w512-h910-no/gplus1559079390.png
Click to expand...
Click to collapse
I wish mine could do this but I'm also only able to achieve this with airplane mode turned on.

dt33 said:
Not for me and dont ask me why. I just dont know why this happens. Only thing I did, was boot into recovery mode and wipe cache.
https://lh6.googleusercontent.com/-.../Sslvnw4hq0M/w512-h910-no/gplus1559079390.png
Click to expand...
Click to collapse
That's cool... not gonna lie, I'm jealous!!

Dark5tar said:
Just like the title says, I would like to know what is the average battery drain that you guys are getting on your S6 and S6E devices while leaving it on idle. My device is SM-920I and the battery drains about 0.7% on WiFi and 1.5% on 4G per hour.
Click to expand...
Click to collapse
At best I get 0.6%/hr with WiFi turned off over night (about 7 hrs). With WiFi on and connected it's worse, 1.1%/hr drain. Weird to me that yours uses less battery on WiFi.
In either case, my 'held awake' time is between 35 minutes and 1 hour, again this is overnight.
I've done a lot of tests since getting the phone and this is consistent for me.
Sent from my SM-G920T using Tapatalk

SlamTheDoor said:
At best I get 0.6%/hr with WiFi turned off over night (about 7 hrs). With WiFi on and connected it's worse, 1.1%/hr drain. Weird to me that yours uses less battery on WiFi.
In either case, my 'held awake' time is between 35 minutes and 1 hour, again this is overnight.
I've done a lot of tests since getting the phone and this is consistent for me.
Sent from my SM-G920T using Tapatalk
Click to expand...
Click to collapse
While on 3/4G, Google Services and Android Systems are draining more data than on WiFi which leads to higher battery usage on mine.

I get a drain of 7- 8% during my sleep with wifi 3g off and all multitasking off and greenify(root) on. please help me to reduce it. how to get my phone into deep sleep?

ammadb said:
I get a drain of 7- 8% during my sleep with wifi 3g off and all multitasking off and greenify(root) on. please help me to reduce it. how to get my phone into deep sleep?
Click to expand...
Click to collapse
Get better battery starts and check the kernel and partial wakelocks to see what keeps it awake.

I have some atrocious battery drain. Right now im on XTreSoLite 2.0 Odex and uniKernel with pretty much every service disabled, greenified, app removed, etc thats possible and still get bad drain. Ive even gotten rid of the Google app in my quest to fix it. I have more battery and wakelock managing apps installed i do than everything else combined. Literally nothing i do seems to make it reasonable. Right now im draining at 7.9% an hour, I average 5 hours of SOT with 16 of standby. If I let my device idle I get 2 hours or so of SOT with standby of 18 hours. Overnight drain can be anywhere from 10% to 2% and I can't figure out what to do to fix it. And the worst part is, all my wakelocks aren't anything severe. The most severe one I have keeps my device awake for a total of 5 minutes at most over the 16 hour period.
Literally at my wits end.
I even tried to undervolt my processor but I can't find an app that actually works, most just revert what I set after a few minutes. ._.
Stock OS was terrible, my phone would die in literally four hours immediately after after factory reset and not signing into any accounts.

DudeWithThePC said:
I have some atrocious battery drain. Right now im on XTreSoLite 2.0 Odex and uniKernel with pretty much every service disabled, greenified, app removed, etc thats possible and still get bad drain. Ive even gotten rid of the Google app in my quest to fix it. I have more battery and wakelock managing apps installed i do than everything else combined. Literally nothing i do seems to make it reasonable. Right now im draining at 7.9% an hour, I average 5 hours of SOT with 16 of standby. If I let my device idle I get 2 hours or so of SOT with standby of 18 hours. Overnight drain can be anywhere from 10% to 2% and I can't figure out what to do to fix it. And the worst part is, all my wakelocks aren't anything severe. The most severe one I have keeps my device awake for a total of 5 minutes at most over the 16 hour period.
Literally at my wits end.
I even tried to undervolt my processor but I can't find an app that actually works, most just revert what I set after a few minutes. ._.
Stock OS was terrible, my phone would die in literally four hours immediately after after factory reset and not signing into any accounts.
Click to expand...
Click to collapse
Maybe you have removed too much and some app is waiting for another which you have removed or greenified.
BTW a device draining in 4 hours probably means a defective battery, these things can be very dangerous! !!!!

1-4% based on what I have running when I go to bed. I leave everything on.
Sent from my SAMSUNG-SM-G920A using Tapatalk

1-2% missing when i go to bed everythings on including wifi

I just have a night mode in Tasker. It drains around 1% over a night (8 hours) if bad cell, else less than 1%.
My night mode just toggle Bluetooth, data, wifi and GPS off and then on again at morning.

Yesterday had gone 25 hours without charging and still have 39% left but screen time of about 1.25 hours and most of the time on wifi. Talktime of about 1 hour. I haven't rooted or disabled any app and i find this is lot better idle drain than my nexus 5. But yeah i can only get around 4 hour SOT because i always use full brightness.

usually down bout 20%~ when i leave my phone for the night.

The battery lost 5% in the night and the device was not a wake

I left the device on 100% and go to sleep.
When I woke up I see 95% so I check the better battery stats and saw that the phone was in deep sleep all the time just minute and half was a wake.
It say the the mobile standby make it.
I think it too much if the device was sleeping
What do you think? I have a problem with my battery?

no, i guess not because i have arond 4 % loss over night in 8-9 hours. mobile signal strenght is also an issue if you have bad reception. but i guess the drain is normal. nothing to worry about. Are you stock or custom? I am on weta with naptime en greenify.

Unless it's a signal issue that does seem high. I get 1-2% over 6-7 hours over night. I'm not using anything like greenify or naptime either. I get that on Stock 7.0 and on Pure Nexus 7.

Roy_Alter said:
I left the device on 100% and go to sleep.
When I woke up I see 95% so I check the better battery stats and saw that the phone was in deep sleep all the time just minute and half was a wake.
It say the the mobile standby make it.
I think it too much if the device was sleeping
What do you think? I have a problem with my battery?
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Click to collapse
5% over a whole night and you think there is something wrong with your battery? Assuming that is 6-8 hours I'm not sure why you are worried. It is still on and, thus draining. So, if you let it for 24 hours 15% seems high to you?
Eric214 said:
Unless it's a signal issue that does seem high. I get 1-2% over 6-7 hours over night. I'm not using anything like greenify or naptime either. I get that on Stock 7.0 and on Pure Nexus 7.
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Click to collapse
No, it doesn't. Everyone has different setups, and <1% an hour is not high battery drain.
Sent from my Nexus 6P using Tapatalk

ultyrunner said:
5% over a whole night and you think there is something wrong with your battery? Assuming that is 6-8 hours I'm not sure why you are worried. It is still on and, thus draining. So, if you let it for 24 hours 15% seems high to you?
No, it doesn't. Everyone has different setups, and <1% an hour is not high battery drain.
Sent from my Nexus 6P using Tapatalk
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Click to collapse
My thought exactly.
Sound just fine to me.
less than 1% an hour is a sound result.

I WOULD KILL for that kind of idle battery life. I HOPEFULLY get my 6p Thursday. I am on the S5 now running MM and sitting at my desk I get 5% or more per hour drain if I am lucky. right now, if I am not on it much, 10% per hour.

ultyrunner said:
5% over a whole night and you think there is something wrong with your battery? Assuming that is 6-8 hours I'm not sure why you are worried. It is still on and, thus draining. So, if you let it for 24 hours 15% seems high to you?
No, it doesn't. Everyone has different setups, and <1% an hour is not high battery drain.
Sent from my Nexus 6P using Tapatalk
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Click to collapse
Hmm, doing nothing with phone it was 1% every 4 hours on stock. With PN7 its like 1% every 4 hours. This is with about 35 apps installed or no extra apps installed. So if you're seeing about 5% loss overnight for about 6-8 hours, it seems to me your phone isn't deep sleeping very well, cause that means there is a lot of stuff still working in the background. Like i said, unless there is poor signal.
Again this is based on what i see on stock and PN7.

Eric214 said:
Hmm, doing nothing with phone it was 1% every 4 hours on stock. With PN7 its like 1% every 4 hours. This is with about 35 apps installed or no extra apps installed. So if you're seeing about 5% loss overnight for about 6-8 hours, it seems to me your phone isn't deep sleeping very well, cause that means there is a lot of stuff still working in the background. Like i said, unless there is poor signal. Again this is based on what i see on stock and PN7.
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Click to collapse
After being on Android since Gingerbread and using Sammy and Nexus devices, while doze in MM and N has brought a lot of improvements in sleeping battery drain, I'd say that 2% over an entire night is unusually low.
Also, many folks do different things to their phones overnight. If you leave it 'on' but turn off your radios and turn on total silence as opposed to just letting it go to deep sleep but leaving everything 'on', you'll see significant differences in drain.
I'd still just look at 24 hours of no use, doze drainage and if you only got 15% drain that would translate to roughly 7 full days of standby. That's pretty good. In your scenario, 3-6% drain over 24 hours of standby/doze is pretty much unheard of. I'm not aware of any phones that typically give users 17-33 days of standby

ultyrunner said:
After being on Android since Gingerbread and using Sammy and Nexus devices, while doze in MM and N has brought a lot of improvements in sleeping battery drain, I'd say that 2% over an entire night is unusually low.
Also, many folks do different things to their phones overnight. If you leave it 'on' but turn off your radios and turn on total silence as opposed to just letting it go to deep sleep but leaving everything 'on', you'll see significant differences in drain.
I'd still just look at 24 hours of no use, doze drainage and if you only got 15% drain that would translate to roughly 7 full days of standby. That's pretty good. In your scenario, 3-6% drain over 24 hours of standby/doze is pretty much unheard of. I'm not aware of any phones that typically give users 17-33 days of standby
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Click to collapse
I've been on android only and since the droid X days which was Froyo myself.
My phone is exactly the same overnight as during the day. I rarely ever use WiFi since I'm on TMobile. My phone has to be fully available to me since I'm an IT Admin and that means I'm on call site security reasons 24/7. To me getting 5% a night would be making me search through my phone to find three cause LoL

Im not too sure what setting i changed on mine but when i wake up after 7 hours i'm sitting at 99%

10j Batter Drain on T Mobile variant

Every since the update my battery seems to lose a percent every 5-10 minutes the screen is on.
What gives?? Tried a fresh install and everything.

livinin82 said:
Every since the update my battery seems to lose a percent every 5-10 minutes the screen is on.
What gives?? Tried a fresh install and everything.
Click to expand...
Click to collapse
54% in the last 3 hours. This is noticeably different.

Have you looked into whats draining it? i.e. under battery settings or using better battery stats?

Bubba Fett said:
Have you looked into whats draining it? i.e. under battery settings or using better battery stats?
Click to expand...
Click to collapse
Nothing specific. Just screen for the most part and a little bit of chrome. I deleted messenger, and Facebook. Everytime I turn my screen on...By the time I go to turn it off after whatever activity I notice a percent loss.

My battery life has never been what I would call "good", but after the update it has been even worse. Wifi and location off, no facebook at all and screen at auto brightness. The battery seems to lose about 10% an hour and I'm lucky if I get to see 3 hours of screen on time.

I'm getting roughly 0.6% an hour when idle with 10j

T-Mobile. Best ever was 8h SOT with a few percent left in 10d. I am on 10j now rooted. Battery life seems worse but really it's not. Used to get about an hour screen before drops to 99% but now about 20mins. Just seems to measure battery better. This rundown so far was at work in downtown and I was on 41st floor most of the day. I am home now where my LTE is pegged full blast and I could probably pull down at least 5 more hours of this charge depending what I do.

I know it's not a solution in the sense its not solving whatever software is draining the battery but there are aftermarket battery packs for the v20 already that will make the phone last longer.
Zero Lemon specifically makes an excellent aftermarket battery pack if you don't mind the bulk.
I am waiting for a middle man battery pack that's larger than the factory battery but not as massive as the zerolemon.
Sent from my LG-H918 using XDA-Developers Legacy app

Battery drain

Battery Drain
I have the Indian G6 with quad dac and its been 6 months since i own this and im facing huge battety drain. Earlier i used to get 5 hrs of SOT and now i barely reach the 3 hrs SOT mark. Even the charger got damaged and It lost the fast charging capability and charges slowly. I performed a factory reset but still its the same. I dont know what could be the reason but my charging habits were bad. I would charge the phone always at 0% or 5% and I would use the phone while charging but i followed this only since 2 months. I dont think this wouldve degraded the battery so quickly but i dont follow that anymore and charge the phone at 15% or 20% and uptill 90%. I still have warranty left and will they change the battery? Is anyone facing similar problem? Please help me sort out this issue because If nothing else works im considering selling this phone as soon as possible. Thank you.

If you go to Settings > Battery > what apps does it show that are causing your battery drain?
Battery usually has a 6mo warranty of I'm not mistaken

Rehaan said:
If you go to Settings > Battery > what apps does it show that are causing your battery drain?
Battery usually has a 6mo warranty of I'm not mistaken
Click to expand...
Click to collapse
I used Samsung browser before and it drained 16% so I uninstalled that and I use Youtube Vanced which is using 14% now...but even without these apps I still see drainage. It was so bad earlier that I got only around 2.5 to 3hrs of SOT and after a factory reset saw around 4 hrs of SOT..but I have to charge the battery by late evening compared to previously where i would charge at night.