Database Users

battery drains a lot

Hello.
I am having problems with the battery because drains a lot (5% per hour without wifi, 3G, screen off, etc). I looked for this problem and I found that other people resolve it installing francokernel (http://forum.xda-developers.com/showthread.php?p=36553244). The problem was that the tablet uses the 3G even if no SIM card of 3G off.
But, I have installed the francokernel and the problem keeps and I don't know why The francokernel reduce the problem of 3G but my battery keep draining a lot. Can you help me ? I attach images from betterbatterystats. The test is with wifi off, 3g off and only facebook, twitter and whatsapp installed. The model is Nexus 7 3G
Thank you.
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uninstall facebook

It's draining because there is something not allowing it to go to deep sleep. Install cpuspy or similar that will tell you what the CPU is doing.
EDIT: I know there are photos but only a couple are showing up for me.
Sent from my Nexus 7 using Tapatalk 4 Beta

It's definitely doesn't appear to be Facebook or a lack of deep sleep. Despite not seeing the infamous Google services, you may want to verify your location settings as that can override you turning off wi-fi and mobile network.
Sent from my SCH-I545 using Tapatalk 4

I have tested again with CPUSpy (wifi off, 3g off, only I have used 5 min, ...). Now, I see the wakelock PowerManagerService is on 33 min. At any rate, 90% of time the tablet is in deep sleep mode and drains aproximately 6% per hour. I don't know why happen this ... Is it possible that in the deep sleep mode the frequency would be high ?
I attach images of betterbatterystats and CPUSpy. Sorry, I can't upload picture o links (but in the first message I can do it). I put the links below with a "-" behind "http".
Thanks
http-://i42.tinypic.com/mvp8wk.png
http-://i42.tinypic.com/2vrs8cz.png
http-://i44.tinypic.com/2qdmzv8.png
http-://i39.tinypic.com/a9tfnc.jpg

Try restarting your N7. Every time i have this problem I restart my tablet and the battery draining goes away for about a week

[Q] Sudden battery life change

Hello,
I've experienced a sudden change in battery performance.
What used to take around 50% of battery now takes around 85%.
It happened recently, around the same time I started working at a new workplace. The reception is horrible there, maybe that's the issue. However during the weekends, it is around the same.
I was on 4.4.2 stock when it happened and since then I've flashed it again once. I've also tried a couple of different radios (and enabled LTE) and I've always had franco kernel.
Brightness was always on Auto (which I shall turn off to experiment battery life) and wifi is selected to be off when the phone is off.
I have still a few more experiments to do, but I'm considering using warranty services. What do you guys think? It's clearly not as bad as some of the other battery issues I've seen on this forum, but it's quite the change for me. I bought this phone in July 2013.
Here is an example battery usage graph. Charging finished around 1 AM and left it unplugged over night. In the morning (~7 hours) the percentage was at 75%. (5% / hr) Throughout the day, I have used it for text messaging only and by 6 pm, it's at around 13%.
Thanks for taking the time to read my long post.
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You can check what drains battery with BetterBatteryStats. Google it and you'll find.

Thanks for replying.
I have tried that before an OS reset although I couldn't make much out of it. One main thing I noticed was a certain kernel wakelock which, after I googled, was responsible for LTE connectivity. Although this makes sense, I had good battery life even with the LTE chip being used (& auto brightness / wifi always on) prior to this battery incident. By good battery life, I mean 50-60% used by the end of the day

Onto my 3rd factory reset due to battery drain!

Hello folks,
I've had the Rogers Galaxy S 5 for about a week now, and since day 1 I have noticed excessive battery drain by "Android System". This source of drainage occurs especially during idle periods of time causing me to experience rather poor battery performance.
This here is a sample of what my battery stats look like at any given time, notice "Android System" is virtually always the number 1 source of battery consumption.
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I executed a factory reset on the second day of ownership to examine whether this drain would be solved. It wasn't.
I went to bed, and woke up in the morning to check Gsam Battery monitor which gave me this chart:
Notice the part I highlighted in red which demonstrates the overnight battery usage!
Also, GSAM battery monitor still displays "Android System" as the source of the drain.
Among my colleagues I am the only one experiencing this phenomenon, and I am going to factory reset for the third time right now.
Going to run the stock firmware to see whether I am still experiencing this.
I will report back with any new findings soon, hold on tight to your seats!
If the pictures above do not seem to work please click on this link!
http://mediumsteak.imgur.com

I suggest you do the following,
-Disable Location in the notification drop down
-Turn off Hot Word detection for Google Voice Commands.
-Disable bloatware
-Turn off always active WiFi in advanced WiFi settings.
Sent from my SM-G900W8 using Tapatalk

AND,
Try giving it a week to 'settle' without resetting it...
It needs to figure itself out...
All my family member noticed significantly better battery AFTER 1st week.
Sent from my Rooted Sprint GS5 SM-G900P

msavic6 said:
I suggest you do the following,
-Disable Location in the notification drop down
-Turn off Hot Word detection for Google Voice Commands.
-Disable bloatware
-Turn off always active WiFi in advanced WiFi settings.
Sent from my SM-G900W8 using Tapatalk
Click to expand...
Click to collapse
Certainly performed all of the above right after factory reset! Battery still dropped over 10% overnight on standby.
KaptainRandom said:
AND,
Try giving it a week to 'settle' without resetting it...
It needs to figure itself out...
All my family member noticed significantly better battery AFTER 1st week.
Sent from my Rooted Sprint GS5 SM-G900P
Click to expand...
Click to collapse
Makes sense, I will run a few charge cycles!

Why won't my phone sleep?

Bought the phone from a friend who never had battery issues. He factory reset it, then gave it to me. I upgraded to 7.1.1 Dev preview last night via OTA.
Location is set to battery saving, no Bluetooth/NFC/etc. turned on. Google Now is Off.
Unplugged at 715am this morning, didnt turn the screen on again until 1045am.
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If you are waiting for it to say was asleep I don't think they have that the fact it shows 24 hrs when at 89% shows its not using alot of battery I could be wrong but I have never seen anything stating it has slept
Sent from my Nexus 6P using Tapatalk

I'm pretty sure, not 100% though that it doesn't state this as it states "awake time" instead
and looking at your screenshots, although its not constantly awake there are breaks in the bars which would indicate it was "asleep"

brichardson1991 said:
I'm pretty sure, not 100% though that it doesn't state this as it states "awake time" instead
and looking at your screenshots, although its not constantly awake there are breaks in the bars which would indicate it was "asleep"
Click to expand...
Click to collapse
Sure. Definitely some moments. But the screen was off for 3 hours. Isn't Doze or whatever supposed to kick in? 11% in 3 hours with literally no SOT.

Better question, what could be causing Android OS to keep the phone away for 50% of the time?

For Doze to kick in, your phone needs to be sitting still with the screen off, and not connected to a charger. That means no moving around and nudging the gyro or other motion sensors, no touching the screen or the buttons
Click to expand...
Click to collapse
You are leaving it and its not in your pocket or anything?

brichardson1991 said:
You are leaving it and its not in your pocket or anything?
Click to expand...
Click to collapse
Yes, part of that time it was just on my desk at work.
How soon after all those conditions are met, does doze kick in?

Battery loss over night

Aloah!
I bought the S7 Edge and used it in stock version. Then I noticed that the battery loses over 10% per night. So I decided to install the Superman ROM with root and deactivated some Samsung Features. But the phone still looses over 10% per night.
I have disabled WLAN, BT and GPS. The only activated feature is the always-on-display, but this could not be the problem, because of AMOLED. I know that Samsung bloates their phones with useless things and I only recognize this battery problem (mostly) on Samsung phones. So I think the battery loss must have to do something with the Samsung features.
So my questions are these two:
1. How can I find the battery-using processes?
2. Is there a near-stock-android ROM which is fully debloated? On the S5 the stock ROM had 1,5 GB and then I installed one which has only 400 MB. So there was much Samsung trash removed.
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since you are rooted start by installing either Wakelock Detector or BetterBatteryStats app and see the output of those in the morning.
also is it a used or new phone? if its used then the battery might be faulty.
also try 1 night with AOD off and see if that gets rid of the issue.

Its a brand new phone. Ok, I try these two apps.
But what is AOD?

Rookie1919 said:
Its a brand new phone. Ok, I try these two apps.
But what is AOD?
Click to expand...
Click to collapse
Always On Display :: AOD

Does this really take that much battery? I mean, its mostly black and that doenst consume battery (mostly).

Rookie1919 said:
Does this really take that much battery? I mean, its mostly black and that doenst consume battery (mostly).
Click to expand...
Click to collapse
Id bet thats where most of your drain is coming from. Im just going by what I recall, but believe AOD accounts for 1 to 2% per hour.
I like having the AOD at night so I keep it on regardless since Im pretty much able to charge my phone at work or in the car, its not a big deal.

Ok, I deactivated the AOD but still got around 7% loss.