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I had seen one too many posts about people asking and complaining about battery drain issues on their G1 phones and it gets tiring to read it every 5-10 posts. So I decided to create this thinktank to pool in ideas from the community and create a set of best practices to maximize mileage of our phones. I'm currently using a HTC Dream with stock battery and my battery life is pretty good with light to medium usage. I would like to contribute to the community by creating this thinktank thread. I hope this can help as a guide for myself and for people who have been having numerous battery drain issues on 5.0.7-DS and variants of this distribution.
This is NOT the ultimate end-all solution for your battery problems. These are just steps to tackle the problem. If you want minimum to no battery drain keep it plugged to socket or plug it in a car battery.
If you would like to contribute your experience, or make any corrections please do not hesitate to post and I'll include them if they seem fit and attach your name as reference. I'll also do my best to give credit where credit is due. Please see the references at the bottom part of the post. Please do not clutter this thread by doing "I'll try this" or "It doesnt work" post. Its more important for all of us to know WHY it work/didnt work. Stick to topic, and be constructive. Be intelligent. Think first.
0. Update your Radio
Updating your G1's radio to the currently-latest version (2.22.23.02) should give you better battery life as well as signal reception (you can always switch back to 2.22.19.26I if it doesn't work out for you)
1. Recalibrate
Take note that BATTERY STATS ARE WIPED whenever you flash a new rom. (since full wipes are required whenever changing ROMS, and /data is where the battery info is.) This usually leads to inaccurate battery readings.
Here's how you recalibrate properly:
- Charge your phone till the GREEN LED shows up. Leave it for another hour.
- While plugged, go to recovery and wipe your battery stats.
- Right after the phone is booted up and settled, unplug and use as per normal till it shuts off. Then charge as per normal.
2. Disabling some basic phone hardware functionality
Turn off GPS, WIFI when not in use. And brightness set to manageable levels. Even loudspeaker. This is self-explanatory. Automation software like LOCALE can be useful, but usually all it takes for you to turn off your ringer, or turn on wifi when you're at a specific area is just a press on the Power control widget.
3. Overclocked kernels
Running on full overclock speed (by default is 528mhz or even higher on some kernels) will drain your battery faster and you'll notice significant heat increase when you're using your phone along with 3G.
Although im using pershoots 576mhz overclock kernel, I do not max it to 576 unless needed. The reason why I use his kernel is due to its UNDERVOLT capability. I have set up my phone using SetCPU
MAXFREQ: 480,
MINFREQ: 176
CPU Governor : ONDEMAND.
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Click to collapse
Usually I would set my phone to 384mhz if im going to stay on it longer (texting/long browsing etc). On the sleep mode I set it to 122mhz to 384mhz.
4. Tame your widgets, minimize using them.
Widgets that constantly connect to the internet, or constantly refreshing on the screen to update data being shown on the screen at extremely small intervals would also give you battery drain. Minimizing widgets can help minimize applications running in the background (free up memory) and avoiding your phone going on "partial sleep". Also tweak your widgets to update as less as manageably possible. If for some reason you can't see the next suggestion.
Aside from that you might want to disable Background syncing and do manual syncing. Aside from saving your data plan, it also saves battery life. You can disable it by doing the following:
Menu > Settings > Accounts & Sync > Background Data - OFF
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Click to collapse
manually update your facebook widget or contacts/gmail by
Menu > Accounts & Sync > Facebook (or GMail) > Sync.
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Click to collapse
5. 3G, 2G, switch off, or automate it.
You'll notice that inside the default settings for mobile networks. Setting to 2G will "save battery" which is actually true. The connection will definitely be slower, but if you like your phone to last longer throughout the day, either switch to 2G or turn it off altogether.
Also, similar to juice defender, I use 2g/3g toggle and toggle data as and when needed.
Another suggestion that I just found out recently is the use of Juice Defender app [d]. It automatically turns on or off your APN settings at intervals. You might want to try to look at that app if you cannot do #4
6. Disable live wallpapers. Auto Updating Sense
Remember that 2.1 isnt actually built for our old phones. and livewallpapers do require cpu/gpu processes. These are also running in the background and may run while your phone is asleep. So turning them off will benefit you.
7. Refrain from using Automated task killers and choose what you kill.
If you see that the app you had been trying to kill a few times keeps coming back. Stop killing it. Everytime you do, and whenever it respawns, CPU flies to 100%. Go back to #4.
8. Disable Market notifications.
- Open the Market application.
- Select the Menu key.
- Select Downloads.
- Select the Menu key again.
- Select Notifications.
- Select the Do not notify me radio button. press [Ok]
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Click to collapse
9. Make your phone sleep.
Open your spareparts application, Go to End button behavior. Select "Go to sleep"
10. Under the hood tweaks
10.1 Extending Wifi scan intervals
Edit the wifi scan interval in /system/build.sapphire.prop (or build.trout.prop if you have a G1)
# Time between scans in seconds. Keep it high to minimize battery drain.
# This only affects the case in which there are remembered access points,
# but none are in range.
wifi.supplicant_scan_interval = 45
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Click to collapse
Changing this number to just 90 second will half your wifi scans. Obviously larger numbers can mean less wifi scans which means more battery life, though it may take a little longer for your phone to pick up a remembered access point when in range. This is not just a CM/Eclair thing, it can also work for Donut phones.
This setting needs a reboot after editing the file. Edit it with Root Explorer, or nano as root if you have CM5, or pull the file with adb then edit it then push it back.
11. Remove your phone from your pocket whenever you can.
Body heat deteriorates battery life no kidding! there had been already studies to back it. I keep my phone either on my hand or outside of my pocket to keep it cool. Do whatever is manageable in your environment. If you're using your phone as a music player streaming using streamfurious and stuff. dont let your body heat add to the heat already been generated by your phone itself.
References / Updates :
[a] cyanogen recalibrating batteries : http://wiki.cyanogenmod.com/index.php/Troubleshooting#Battery_recalibration
thanks to mejorguille for correction on /data and wiping.
pershoot UV kernel: http://forum.xda-developers.com/showthread.php?t=666850
[c] SetCPU main site : http://www.pokedev.com/setcpu/ - Thanks also to ShadowCH for tip.
[d] JuiceDefender : http://www.latedroid.com/2010/01/juicedefender.html -
- Thanks to shohid1234 for 3G-2G toggle
[e] Thanks to Jaymzz for tip on disabling market: http://forum.cyanogenmod.com/index.php?/topic/94-i-fixed-my-battery-drain/
[06/02] thanks to Arkain2k for tip #0
[06/04] Thanks to Foo_Blyat's tip for disabling background sync and manual updates for fb/gmail (item 4) http://forum.xda-developers.com/showpost.php?p=6670907&postcount=36
[06/04] Thanks to Super Jamie for tip 10.1 extending wifi scans http://forum.xda-developers.com/showpost.php?p=6684954&postcount=49
reserved in case something nice comes up
10. Remove your phone from your pocket whenever you can.
Body heat deteriorates battery life no kidding! there had been already studies to back it. I keep my phone either on my hand or outside of my pocket to keep it cool. Do whatever is manageable in your environment. If you're using your phone as a music player streaming using streamfurious and stuff. dont let your body heat add to the heat already been generated by your phone itself.
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Click to collapse
really? isnt warmth charging batterys? in my old gameboy years i always put my batteries on the heater when the drained completely and after an hour i could play again with the old batteries.
1. Recalibrate [a]
Take note NOT TO WIPE BATTERY STATS whenever you flash a new rom and your battery is less than 90%. This usually leads to inaccurate battery readings. If you already wiped your battery during one of your flashes, here's how you recalibrate properly:
- Charge your phone till the GREEN LED shows up. Leave it for another hour.
- While plugged, go to recovery and wipe your battery stats.
- Right after the phone is booted up and settled, unplug and use as per normal till it shuts off. Then charge as per normal.
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Click to collapse
This is true, but since battery stats are stored on the data partition, a data wipe also deletes the battery stats. A lot of rom's require a full wipe, meaning data and dalvik, so battery stats are deleted whether you select the option or not.
Since001 said:
really? isnt warmth charging batterys? in my old gameboy years i always put my batteries on the heater when the drained completely and after an hour i could play again with the old batteries.
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Click to collapse
Hi!
Yes Im very familiar with that practice because i do that too. The reason might be because of the composition of the battery (alkaline, non alkaline). Usually we put it under the sun so that the heat will help change the composition of the compound inside the battery in order for it to lower down its resistance. Leading to a "charge".
But now we are using Li-Ion batteries, and I do not suggest putting them under the sun because it will deteriorate your battery capacity holding charge and its lifecycle.
reference: http://www.batteryuniversity.com/parttwo-34.htm see figure 1.
samaral said:
Hi!
Yes Im very familiar with that practice because i do that too. The reason might be because of the composition of the battery (alkaline, non alkaline). Usually we put it under the sun so that the heat will help change the composition of the compound inside the battery in order for it to lower down its resistance. Leading to a "charge".
But now we are using Li-Ion batteries, and I do not suggest putting them under the sun because it will deteriorate your battery capacity holding charge and its lifecycle.
reference: http://www.batteryuniversity.com/parttwo-34.htm see figure 1.
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Click to collapse
Thanks, that makes sense.
Made me lol to see that there actually is a "battery university"
Thank you! this post is noted
mejorguille said:
This is true, but since battery stats are stored on the data partition, a data wipe also deletes the battery stats. A lot of rom's require a full wipe, meaning data and dalvik, so battery stats are deleted whether you select the option or not.
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Noted. I have edited the guide to reflect your insight.
Thank you very much
how about going to setting - about phone - battery use?
there you can find out exactly whats killing your battery and take appropiate action.
Also, similar to juice defender, I use 2g/3g toggle and toggel data as and when needed. Using these two widgets i have no battery issues.
Post noted and added on top
shohid1234 said:
how about going to setting - about phone - battery use?
there you can find out exactly whats killing your battery and take appropiate action.
Also, similar to juice defender, I use 2g/3g toggle and toggel data as and when needed. Using these two widgets i have no battery issues.
Click to expand...
Click to collapse
Noted. Your suggestion is added on top.
change preferred network type helped for me increasing battery life
Hello all,
as describe in post
forum.xda-developers.com/showpost.php?p=6432560&postcount=1
changing preferred network type worked for me.
default setting: WCDMA preferred drains my battery in a few hours, crazy
within CM 5.0.7-test7 I was able to change to: GSM/CDMA auto and it worked
But now in the final release 5.0.7-DS I can not select this setting. Perhaps it correlates to the this (PRL) info in brackets.
It seems that no "auto" setting want be working so I am trying WCDMA only right now and will see if I have a network in 2G networks too.
Bye morT
Hhmm let me think…
Running a prrocessor that's massively overclocked with software that was never meant to run on our g1's I have an idea.
****** off back to stock or get over it
I mean seriously people come on, we have set cpu for power profile management, basic battery usage which is dim screen, turn off wifi and 3g when not in use blah blah blah same **** written in every guide about battery life for ANY roms from cupcake to eclair.
As I said, get over it or go back to stock.
[highlight]Mod Edit: Please watch your language and don't flame others.[/highlight]
im sorry does turning on "display battery status" in spare parts still effect battery life? TIA
Ive noticed that bluetooth is killlllling battery life, but dont know if its normal. I charged to 100% and turned everything on, leaving screen on the whole time and what not.
While I was actively using the net over WiFi, I had nothing using the bluetooth, and both seem to eat up 20%..
This might be normal, might not be, but thought it was odd that it being on, but not in use, ate up just as much as functioning, in use, wifi.
whats funny to me is as soon as my phone dies i plug it up reboot it a few times and my battery is at 70%
.... i think its not reading correctly .. i mean fully charged play talk text browse till it shuts off .. plug it in turn it right back on then reboot ..
and my battery is back at 70% which is weird ... anyone else notice that???
also wifi, gps is on screen brightness is standard !!!
batteries really seem to be the least developed technology in our high tech phones. feels like a sportscar with a one gallon tank...the fun's over quickly...
turned off my 3G and got a lot of additional battery life. with bad 3G reception (like in the place I live in) the phone was sometimes sucked empty in just a few hours, now I get two days.
another thing that really helped me extend my battery life was turning on airplane mode when I went to bed.
how about dont use overclock or any other cpu speed up tool....maybe the speed they are factory set to is there for a reason...Hmmmmmmm
dcowboys2184 said:
whats funny to me is as soon as my phone dies i plug it up reboot it a few times and my battery is at 70%
.... i think its not reading correctly .. i mean fully charged play talk text browse till it shuts off .. plug it in turn it right back on then reboot ..
and my battery is back at 70% which is weird ... anyone else notice that???
also wifi, gps is on screen brightness is standard !!!
Click to expand...
Click to collapse
You should go through a battery recalibration - steps on the first page.
Best Practices for Improving Battery Life for CM 5.0.7 (and variant ROMS) is to use this ROM, Thanks.
Do whatever you like, show or hide battery status in the Spare parts, calibrate or not....the battery remains....for loOng....enough time....
hot/cold controversy
Since001 said:
really? isnt warmth charging batterys? in my old gameboy years i always put my batteries on the heater when the drained completely and after an hour i could play again with the old batteries.
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Click to collapse
Since I have a background in electrical theory and chemistry, let me end this debate once and for all: heat makes atoms (and therefore molecules) move faster. Lack of heat (cold) makes them move slower. In general, fast-moving atoms in batteries mean MORE power, not less. The reason your car doesn't want to start when temperatures are subzero is that the battery acid (electrolyte) molecules are moving too slowly to oxidize (give off e-, electrons) and turn back into positive ions. The same is true for the ol' Gameboy AAs -- put them on the heater, the dry cell warm up, and more electrons are transferred to the anode by anions, the positive ions (cations) are more able to travel to travel back to the cathode (in the case of dry/wet-cell rechargeable storage batteries). Heat acts as a catalyst to produce electricity. Some of you may have even taken your car battery indoors if the electrolyte froze in the winter. Some of your cars may have battery blankets or even battery heaters if you live really far up north. In addition, the process of charging a Li-Ion, Ni-mH, or even lead acid battery will produce heat, because chemical conversion is bi-directional, but anyway . . . you charge the G1, it gets hot. You use it heavily, it gets hot. You know you're spending electrons somewhere when it gets hot period. Keeping the phone cool will not increase battery life or make it charge fast. What lower battery temperatures will do is lengthen the battery's overall life. What happens if you leave meat out in 100F/30C temperatures? It goes bad quickly. Same principle in Li-ion. The rechargeable battery is ideally an efficient, closed system of ion exchange that should work for many (hundreds) of duty cycles, but eventually heat plays a role in deterioration of the electrolyte and chemical catalysts inside.
So put your extra charged batteries (but you don't want a Li-ion or Ni-mH battery to sit very long in an discharged state, so be careful here) in the refrigerator in an airtight bag (rotating on a daily basis) if you really want them to last a long time, but don't charge them frozen (ka-boom!) and remember cold batteries charge slowly. Car batteries in sub-tropical areas are replaced at a rate of about once every 24 months, but in Sweden? Maybe every five or six years. Cold temperatures slow down chemical deterioration just like cold keeps that steak from becoming maggot food.
Again, a hot G1 may weaken its own internal components and batteries over time, but putting it on ice won't give you an extra 6 hours to oogle Miley Cyrus' vBlog
Hope this helps.
For me, unless I'm expecting a text or a call always have my phone on airplane mode. I turn it off every hour or so to see if I got any unimportant texts, and then turn it back on
I have problem on my Note 10.1,.when is my battery on 5 % i get low brightness.Does anyone know how to fix this,to set brightness on max when is battery low????
Samsung galaxy note 10.1 n8000 4.1.2
dekar123 said:
I have problem on my Note 10.1,.when is my battery on 5 % i get low brightness.Does anyone know how to fix this,to set brightness on max when is battery low????
Samsung galaxy note 10.1 n8000 4.1.2
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that's a feature. Charge it
shaun298 said:
that's a feature. Charge it
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how???? im unable to change brightness when battery is 5 %
dekar123 said:
how???? im unable to change brightness when battery is 5 %
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Dud, just charge it up.
Aluyi said:
Dud, just charge it up.
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It's not a solution,my chinese 9` inch tablet whith 5 % off battery could stand mabye 20 minutes,is that on all note 10`1 tablets???
Does anyone know how to get full brightness when my battery is 5 %???????
There is no way to change it.
It propably protects the battery to become too empty without getting your device plugged in time. "Too empty" means that sometimes if you drain your litium battery empty totally, it wont start to charge it at all. So it is there for protecting you and your device without having next problem not being able to charge it.
Sent from my GT-N8000 using Tapatalk 4
enigma_x said:
There is no way to change it.
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Have you ever investigated this subject that you are so sure? If you cannot do it - don't assume that no one can.
I don't also see any relation between dimming the screen and protecting the battery of getting broken. If 5% level is a level on which the battery should be charged because of the damage risk, then it would be absurd to dim the screen (ie take an action aimed at saving the remaining power so the user can work a few minutes longer on the last remaining 5% until it reaches 0 or 1% = drain battery even more = in your theory: increasing the risk of the damage even more), and not to turn off the device at all. Be aware, that Samsung indeed implemented a protection aimed to secure the user of the risk of breaking the battery (well, I don't think it's the clue anyway - iI guess the main purpose is in preserving user of data loss/filesystem corruption, which is possible to occur when the system is being shutdown in an "immediate" way, without chance to perform shutdown sequence properly) due to full discharge, but it is triggered on 0 - 1% level and is resulting in starting a "regular" system shutdown, aimed mainly to save all the working data before user loses it *** See comment at the very end of my post for additional info about changing this behavior, which is confirmed to work by myself...
It is almost ALWAYS possible to mod behavior of the system, especially by decompiling system apps and modyfing smali, which is not extremely difficult/impossible by the way, as the community has released such a solutions for many issues/feature requests, concerning even n8000 itself (ink lockscreen, syscope disable, power menu, flashable themes...).
In this case, I can see another possibility, which is even less intrusive to the system; AFAIR the percentage level of 5% is not embedded in some system or framework app, but it is defined in one of the system's apps preferences (guess settings provider? dont remember...), in sqlite database. And sqlite database can be easily accessed and its content can be modified by sqlite tools, ie sqlite3 binary from command line, and even some apps from play store. Then, you shall be able to lower the value to, for example, 1%, so the screen backlight will be turned off with further delay, ie. at REALLY critical power level of 1%..
EDIT: Didn't found above setting, dont have time for this, but found another one (at database lying at com.android.provider.settings) - "dim_screen" which is set 1 by default. Maybe changing it to 0 with any SQL editor will force NOT to dim screen at all.
An for the begin, I have a solution that is very very very possible to work...
As for now, I have not tested it, especially if the critical battery level setting (default 5%) has direct relation to the battery level on which screen is dimmed, but I am ALMOST sure about it, as the crtitical level setting that I am talking about (no matter where it is stored...) is recognized system-wide.
Oh, almost forgot, the solution!!!
Install Xposed Framework (search for it on xda if u dunno what it is) + module XBatteryThemer - apart of other options, it has the option to lower critical battery level (as well as two other levels, which determine displaying the low battery alert popup) to as low as 1%. Your screen shall no longer dim at 5%.
*** actually, there is another one Xposed module (CriticalBatteryShutdown, or something...?) which can force the device not to turn off when battery reaches some level between 0 and 1%, which is arbitrary action by default. With this mod the device is working untile theres really no power left, which sometimes can give you additional 10 minutes. A
dekar123 said:
Does anyone know how to get full brightness when my battery is 5 %???????
Click to expand...
Click to collapse
Please correct me if I´m wrong, does that make sense to you if your battery is 5% and you thinking of raising the slider higher ? Maybe you should check your energy saving settings. My two cents.
esgie said:
Have you ever investigated this subject that you are so sure? If you cannot do it - don't assume that no one can.
I don't also see any relation between dimming the screen and protecting the battery of getting broken. If 5% level is a level on which the battery should be charged because of the damage risk, then it would be absurd to dim the screen (ie take an action aimed at saving the remaining power so the user can work a few minutes longer on the last remaining 5% until it reaches 0 or 1% = drain battery even more = in your theory: increasing the risk of the damage even more), and not to turn off the device at all. Be aware, that Samsung indeed implemented a protection aimed to secure the user of the risk of breaking the battery (well, I don't think it's the clue anyway - iI guess the main purpose is in preserving user of data loss/filesystem corruption, which is possible to occur when the system is being shutdown in an "immediate" way, without chance to perform shutdown sequence properly) due to full discharge, but it is triggered on 0 - 1% level and is resulting in starting a "regular" system shutdown, aimed mainly to save all the working data before user loses it *** See comment at the very end of my post for additional info about changing this behavior, which is confirmed to work by myself...
It is almost ALWAYS possible to mod behavior of the system, especially by decompiling system apps and modyfing smali, which is not extremely difficult/impossible by the way, as the community has released such a solutions for many issues/feature requests, concerning even n8000 itself (ink lockscreen, syscope disable, power menu, flashable themes...).
In this case, I can see another possibility, which is even less intrusive to the system; AFAIR the percentage level of 5% is not embedded in some system or framework app, but it is defined in one of the system's apps preferences (guess settings provider? dont remember...), in sqlite database. And sqlite database can be easily accessed and its content can be modified by sqlite tools, ie sqlite3 binary from command line, and even some apps from play store. Then, you shall be able to lower the value to, for example, 1%, so the screen backlight will be turned off with further delay, ie. at REALLY critical power level of 1%..
EDIT: Didn't found above setting, dont have time for this, but found another one (at database lying at com.android.provider.settings) - "dim_screen" which is set 1 by default. Maybe changing it to 0 with any SQL editor will force NOT to dim screen at all.
An for the begin, I have a solution that is very very very possible to work...
As for now, I have not tested it, especially if the critical battery level setting (default 5%) has direct relation to the battery level on which screen is dimmed, but I am ALMOST sure about it, as the crtitical level setting that I am talking about (no matter where it is stored...) is recognized system-wide.
Oh, almost forgot, the solution!!!
Install Xposed Framework (search for it on xda if u dunno what it is) + module XBatteryThemer - apart of other options, it has the option to lower critical battery level (as well as two other levels, which determine displaying the low battery alert popup) to as low as 1%. Your screen shall no longer dim at 5%.
*** actually, there is another one Xposed module (CriticalBatteryShutdown, or something...?) which can force the device not to turn off when battery reaches some level between 0 and 1%, which is arbitrary action by default. With this mod the device is working untile theres really no power left, which sometimes can give you additional 10 minutes. A
Click to expand...
Click to collapse
Did I say that 5% is the minimum level? No, I didnt. All I said it is, it gives you more time and IF you drain your battery EMPTY, it may not charge. Of course there are self-protection manager already, but as you know, they dont always work as they should. There are several questions on net what to do when the phone doesnt start charging because they drained the battery to a state to auto-shut off. I dont understand why anyone would like to drain the battery almost empty and in a bad scenario you have a dead battery. Will it happen with your device? Maybe or maybe not. And it is not even healthy for a lithium battery to let it full disharged/cycled on everytime.
And yes I have read that there are apps that allows you to change this but only if your device is rooted. Never tried, mine is not rooted.
This will explain it very well: http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
Sent from my Galaxy Note 10.1 (N8000).
---------- Post added at 07:01 PM ---------- Previous post was at 06:55 PM ----------
Aluyi said:
Please correct me if I´m wrong, does that make sense to you if your battery is 5% and you thinking of raising the slider higher ? Maybe you should check your energy saving settings. My two cents.
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Click to collapse
No, you cannot set the brightness by a slider when the battery level is 5%. It automatically goes to a state to save the battery. It is built in the system.
Sent from my Galaxy Note 10.1 (N8000).
I recently noticed after the latest update excessive battery drain as seen in screenshots posted below. I have tried a factory reset and then unlocked bootloader to root and added greenify to try help save my battery. Does anyone have any tips on what else to try?
Have you tried to figure out what the Miscellaneous drain is? At least on my tablet I don't have that category in battery usage.
MidgetMob said:
Have you tried to figure out what the Miscellaneous drain is? At least on my tablet I don't have that category in battery usage.
Click to expand...
Click to collapse
Miscellaneous is android figuring out the rest of the battery stats, it's normal for new devices.
Themaniacboy said:
Miscellaneous is android figuring out the rest of the battery stats, it's normal for new devices.
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Click to collapse
If by "new" you mean recently flashed/factory restored, then I'm not sure what to say. Even after flashing a recovery image I've never noticed that category. The only reason why I asked was because I assumed that was what you were referencing as being excessive.
If you were referencing the 24+ hour battery life graph shown in your screenshots, then that seems about right. Unfortunately the tablet has never been known to have stellar battery life unless it's on battery saver 24/7.
MidgetMob said:
If by "new" you mean recently flashed/factory restored, then I'm not sure what to say. Even after flashing a recovery image I've never noticed that category. The only reason why I asked was because I assumed that was what you were referencing as being excessive.
If you were referencing the 24+ hour battery life graph shown in your screenshots, then that seems about right. Unfortunately the tablet has never been known to have stellar battery life unless it's on battery saver 24/7.
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Click to collapse
Seems about right?! He had 7min 2sec screen on time. If thats "about right" to you... you need to RMA your tablet.
Clearly whatever "Miscellaneous" is, is his issue.
mackay508 said:
I recently noticed after the latest update excessive battery drain as seen in screenshots posted below. I have tried a factory reset and then unlocked bootloader to root and added greenify to try help save my battery. Does anyone have any tips on what else to try?
Click to expand...
Click to collapse
Ok, so I noticed the very same thing when I got my Shield, I haven't rooted (I had on KitKat to restore some backups, then didn't do it again in Lollipop yet). I contacted Nvidia's service via livechat and got this answer. It did some considerable difference, although I still think it's draining a little too fast, but my old tablet had a pretty strong battery so I was just spoiled by it it seems >.<
So here it goes:
Nvidia Shield Callibration: (this takes a while)
You will have to calibrate the battery for just one time and observe the device battery backup for 2-3days to see the changes.
1: Drain your Shield tablet battery by using it normally until it turns off by itself.
2: Power-on your Shield tablet, if it wakes up and if you see some power left, follow step 1.
3: If Shield tablet is now drained to the point it can't wake up, set the device to charge for 7-8 hours.
The device should remain off when you set it for charging here.
4: Unplug the charger after 7-8hours, power on and wait for the battery charge to drop down to 90-95%.
5: Once the device battery drops down to 90-95%, plug in the charger and charge for one complete hour.
6: Unplug the charger once the device is fully charged.
7: Go to Shield settings > Shield power control > Apps> select optimize all option.
8: Go to Shield settings > Shield power control > system>
• Set the brightness to auto.
• Change the sleep option to 2 minutes of inactivity instead of default 10 minutes inactivity.
• Change the processor mode to either optimized or Battery savings.
• Check the WiFi optimization on.
Observe the device performance and report to us if you are still facing issue with the battery backup..
And then they gave me some tips for better battery life in general, I follow them (mostly) and my battery seems to hold on decently:
1: Always use the Shield tablet charger and not the computer USB ports or any other charger as the power specifications vary from the device to device.
2: In case if the charger is missing, use the back port of the desktop computer to charge the device instead of front port.
3: Always remember to exit the application instead of tapping the home button which will continue to run the application in the background.
4: Restart your Shield tablet at least once in a week. This will refresh the device making it work faster and efficient.
5: Connect the charger only when the battery comes down to 15% and unplug the charger only when it reaches 90% or above. This will reduce the number of charge cycles which will make battery last longer.
6: Use a third party app manager like Clean Master and free the memory at-least once a day to keep the device running faster.
To notice if the battery is fully/optimally charged when the device is off, look for the led indicator next to the charging port. It should be green, indicating it is fully/optimally charged
I have had a battery drain for several weeks now. It isn't to severe but the biggest issue bothering me the most is at night it is draining about 5-6% even with battery saver turned on. It used to be that in normal mode, the battery would only drop 2-3% over night. I do not charge at night.
I am fully updated and I even reset the phone to factory 2 days ago and the issue still persists. Nothing seems to stand out in the battery stats with regards to apps sucking battery %. So I think this is an issue where it is not going into Doze or Deep Doze but I dont know how to determine that.
Any suggestions how to find the problem?
(on android 10)
When you wake up in the morning...
Go into "Settings"
Then "Battery"
Then click the top right three dots
Then select "Battery Usage"
It should show you which apps used the most battery during the night.
JohnC said:
(on android 10)
When you wake up in the morning...
Go into "Settings"
Then "Battery"
Then click the top right three dots
Then select "Battery Usage"
It should show you which apps used the most battery during the night.
Click to expand...
Click to collapse
I have done that. No apps appear to be doing anything unusual. There are no battery hogs showing up. Not even excessive google services usage or anything. That is why I think this may be a situation where it isn't going into doze or deep doze like it used to but I dont know how to check or monitor that. that info doesn't show in battery stats.
I never heard of this doze/deep doze mode - where did you see this?
I ask because I typically get 10% loss overnight with what I thought was very good because the pixel often then calculates I have 2 days of remaining battery life with that stat.
JohnC said:
I never heard of this doze/deep doze mode - where did you see this?
I ask because I typically get 10% loss overnight with what I thought was very good because the pixel often then calculates I have 2 days of remaining battery life with that stat.
Click to expand...
Click to collapse
You can google it as there are tons of articles about it but here is some insight into it from the developer side: https://bignerdranch.com/blog/diving-into-doze-mode-for-developers/
OK, so it says in order to go into deep-doze, the phone:
1) Must not be charging
2) The screen is off
3) The phone is not moving
So, during the night, are all three of these conditions met?
Also, the device will come out of deep-doze if an incoming push notification is received - could one of your apps be receiving push notifications during the night?
Also, "Any process using a foreground service is exempt from Doze Mode effects, which is key for long-running applications"...do you possibly have any apps that have a foreground service?
Have you tried to switch off Bluetooth, it has a huge impact on battery even if not in use.
I've used apps before. Can't remember but gsam might be one...
It's possible to identify apps that are holding wake locks. That's the first place to check for battery drain.
lop1 said:
Have you tried to switch off Bluetooth, it has a huge impact on battery even if not in use.
Click to expand...
Click to collapse
I always keep WiFi, bluetooth, NFC and location off.
a1291762 said:
I've used apps before. Can't remember but gsam might be one...
It's possible to identify apps that are holding wake locks. That's the first place to check for battery drain.
Click to expand...
Click to collapse
all the apps I can find to track wake locks seem to need ROOT. I'd rather not do that as then I lose OTA updates.
After some extreme disabling of user app, system apps, services, etc. I finally got back to 3% battery drop overnight. I'm not sure which one was the culprit yet but i'll start enabling things as I need them and keep monitoring.
I'm having heavy battery drain. I already charged to 100 and less to 30 minutes i lost 10%.
It began since last update on my case.
After you see a big drain, DON'T plug in and...
Go into "Settings"
Then "Battery"
Then click the top right three dots
Then select "Battery Usage"
It should show you which apps are to blame for the drain.
badtlc said:
all the apps I can find to track wake locks seem to need ROOT.
Click to expand...
Click to collapse
Gsam needs permissions but these can be set with USB debugging, no root needed.
So one thing I have learned is that it appears every time I reboot, gsam thinks my wifi is on even though I have it off. If i turn it on and then back off. Gsam now says wifi is off.
So i got through the night at 3% battery drain but now I am realizing that my phone will not go into deep sleep during the day. Any suggestions how to fix that?
According to the details in the link posted earlier, it will never go into deep sleep if the phone is moving.
JohnC said:
According to the details in the link posted earlier, it will never go into deep sleep if the phone is moving.
Click to expand...
Click to collapse
I leave my phone sitting on a desk all day. There has to be some Android services that only operate during the day but i can't dtermine what those might be.
badtlc said:
So i got through the night at 3% battery drain but now I am realizing that my phone will not go into deep sleep during the day. Any suggestions how to fix that?
Click to expand...
Click to collapse
Was gsam able to identify which app was holding a wake lock?
Or maybe triggering frequent wakeups?
Both of those would prevent doze...
Battery Guru is good for chasing drains (with ADBs), add BBS + adbs and you can find anything using them together!
a1291762 said:
Was gsam able to identify which app was holding a wake lock?
Or maybe triggering frequent wakeups?
Both of those would prevent doze...
Click to expand...
Click to collapse
Google play services mostly. There was a large amount from "Adaptive connectiviy" but when I disabled that those went away.
Hi, haven't had a Pixel for a long time (last one was a 4 XL) so pardon my Aly question
Brand new Pixel 7 Pro, charged at 100% and went to bed with AOD on, woke up after 7h with 92% battery: is this normal?
PS: I'm used to Xiaomi 13 Pro with AOD off using almost 0% overnight.
Thx
I'd be very surprised if a phone really consumed 0% over 7 hours, WITH AOD on. Infinite battery life?
That said, sounds about normal, especially until the system sets.
I believe Xiaomi is sort of cheating with batt %, since in the morning stays at 100% even after 15 mins of usage
By the way, I disabled AOD and will test tonight.
Happy to be back to a Pixel though
Also note that if you put it face down on a flat surface it will activate DND, and do try the bedtime mode since it reduces battery consumption.
How do you enable bedtime mode?
Look in settings, it's under Digital Wellbeing
Thx
Battery will adjust with use, it consumes quite a bit more than normal the first few days.
Once it adjusted, for me it went down to 0.6-0.7%/hr. That was before I started installing apps though!
What about charging speed?
Is there a switch to turn on/off adaptive charging to have quicker charging during the day?
Nope, you have to settle for it. For me, it's fast enough to be honest...
The Xioami.waa charging at 120W 0 to 100 in 20 mins
thegios said:
The Xioami.waa charging at 120W 0 to 100 in 20 mins
Click to expand...
Click to collapse
Great for long term battery life.
Xiaomi gives me a new phone for free every quarter, who cares
thegios said:
I believe Xiaomi is sort of cheating with batt %, since in the morning stays at 100% even after 15 mins of usage
By the way, I disabled AOD and will test tonight.
Happy to be back to a Pixel though
Click to expand...
Click to collapse
It's not cheating really. Just their charging "design". If you keep a Xiaomi phone on a charger even after it charges 100%, it actually charges a bit more than 100% you just can't see it. So, from 100% to 99% is like not actually 1% of battery capacity but like 3-4-5%.
krakout said:
Also note that if you put it face down on a flat surface it will activate DND, and do try the bedtime mode since it reduces battery consumption.
Click to expand...
Click to collapse
I noticed that, when on charge, if I simply turn on Do Not Disturb, the adaptive charging notification appears, but if I turn on bedtime mode, the adaptive charging notification disappears.
thegios said:
I noticed that, when on charge, if I simply turn on Do Not Disturb, the adaptive charging notification appears, but if I turn on bedtime mode, the adaptive charging notification disappears.
Click to expand...
Click to collapse
Disable global power management; it never did work right. Find the power hogs and deal with each on a case by case basis.
If you find the source(s) of the excessive drain and correct them, the excess battery usage disappears immediately. Close apps before you put the device in sleep mode.
Developer options > standby apps, if all buckets show as active global power management is disable. If various bucket states exist and/or those states can be altered, it is active. It can't be disable here; power management settings. Altering background battery usage in the individual app settings doesn't invoke global power management...
blackhawk said:
Disable global power management; it never did work right. Find the power hogs and deal with each on a case by case basis.
If you find the source(s) of the excessive drain and correct them, the excess battery usage disappears immediately. Close apps before you put the device in sleep mode.
Developer options > standby apps, if all buckets show as active global power management is disable. If various bucket states exist and/or those states can be altered, it is active. It can't be disable here; power management settings. Altering background battery usage in the individual app settings doesn't invoke global power management...
Click to expand...
Click to collapse
I have not understood a word of your reasoning... Apologies...