Ok guys\gals, I have a question that I haven’t seem to find. Right now I’m using CM7 stable on my Nook emmc drive and it works great (Special thanks to all Devs in the Android world that make all is possible). Me and the family are going on vacation at the end of next month and I’m little concerned about battery life on a 5 hour plane ride with my Nook. I know of the sleep bug that CM has and everyone has been working on it but right now I get about day use out of it with normal to heavy use. This is fine because I’m always somewhere I can plug into if the power starts to get low, but now have a little concern since won’t have power. I have successfully converted a few movies using Handbrake and would love to use my nook as entertainment\movies for me and the family while in the Air. So in my testing I haven’t been able to get through a few 2 hours or so movies without the power draining down fast.
Ok with all that being said, it’s my understanding is that the stock ROM with root (Nooter 3.0) works great with Video and has good battery life. Would it be idea for me to just restore to a stock rooted Rom, then create a CM7 SD-Card? The cm7 card would be for my use only till we great back from Seattle. Mainly I’m just trying to keep the kiddos happy since they have never been on a plane before LOL. They LOVE all what my little Nook can do and love watching movies on the bigger 7 in screen (Transformers is Awesome on the Nook by the way). Any suggestions would be great.
Thanks Guys\Gals…
Derek.
Yes, what you propose will work.
I actually have a dualboot on my NC with CM7 as a primary boot; and the stock (rooted) on the secondary partition. (you can follow the dualboot thread in the developer section).
However, while you are actually USING the NC, the battery life shouldn't be terribly different between CM7 and stock. The biggest difference in battery life is while in "suspend" mode, because CM7 doesn't go into as deep of a sleep mode as when in suspend while in stock; so if you are willing to actually power down the NC, rather than suspend, you shouldn't experience any additional power drain while on CM7.
If you still have significantly more power drain on CM7, it is probably because you are overclocking. I have found that shutting wifi off when not being used, being conservative in the screen brightness, and adjust the the processor tweak in the cyanogen settings to "conservative" will help with battery.
All of that being said, I hope to get an external USB battery the next time I need to fly ....
My Nook, running CM7 Stable with screen brightness at 100% and wifi off, uses about 18% of its battery life for every one hour of full-screen video that I watch (.avi files, Rockplayer, mostly). The times that I've flown with it (only once since installing CM7) I usually watch an hour or two of video with internal battery then plug in one of those Duracell rechargeable batteries that you use with a USB cable to power portable devices. Using the rechargeable with a Nook-specific cable (in case that helps) my battery drain per hour of video drops to 10%. On night flights both rates improve somewhat due to much lower brightness levels. Plus, if the Nook is plugged in but inactive (powered on or off) it'll ADD charge 5-10% per hour. One charged 750MAH battery (half the size of a deck of cards) and I'm good for at least 8 hours of heavy use (could go longer, that's the most I've needed).
As jasoraso mentioned, you're really not going to get much better life while using it, if you switch to Stock. Cm7's battery usage is only when usage is suspended as it can't go as deep into sleep as the stock os can.
So even if you move back to stock, you're not going to get better life while watching videos. Your best option would be as both posters before me mentioned, an external charger.
Related
Curious I am, what is everyone's experiences with battery life on their NC using CM7 or any other flavor of root? I charged to 100% and have used it moderately, maybe 2 or 3 hours of constant use spread out over 1d 25min and some odd seconds and I'm at 32% battery. This use includes surfing, browsing fliki HD, and email.
Does that sound about right, better, or worse? Don't get me wrong, I am not expecting 3 days worth of battery life with heavy use, but as I've had my NC less than a week, I'm just curious as to what to expect as far as battery life.
Thanks!
Signed,
In Living Color
Sounds about right, what version of cm7? Ive been moderatley using it for the past 2 days, streaming pandora, playing angry birds rio, and facebooking.
What about a OC?
lol no lie my NC is at 32% battery to
Hrm. Either 31, or 32 I forget which. No, no OC, haven't found a need for it yet. And yeah, did the Pandora thing + Angry Birds as well. Haven't had any issues with my version of CM7 yet, so I figured I'd hold out on updating + installing to internal memory for a 'stable' release. I say 'stable' release only because even though CM7 is in RC's its plenty stable for me.
yea im running the RC and it seems the Battery life has gone way up for me.
Cool, thanks for the insight. Gives me even more to look forward to.
Been running CM7 RC4 with the OC Kernel @ 1.1Ghz off bootable SD and battery life has been very good by my book...now keep in mind, my reference point is my Droid (overclocked to 1.25Ghz), and now my Droid X (overclocked to 1.3 Ghz), both would be down to 30-40% through the course of a typical day). The NC obviously has a bigger battery, but my goal is to root 30 of these and use them as a textbook replacement/tablet pc as a pilot in our school's language art's department. They charge fast so as long as they get a day out of heavy use and can be charge overnight they are worth every penny.
i don't know why, but my nook likes to start apps on its own. Not sure how to do that. there are like a dozen apps open and i am constantly in app killer to save batt.
oh yeah, is there a wway to prevent apps from auo-launching??
bluewhite79 said:
oh yeah, is there a wway to prevent apps from auo-launching??
Click to expand...
Click to collapse
http://geekfor.me/faq/you-shouldnt-be-using-a-task-killer-with-android/
Read and learn how Android works.
I'm planning to buy Nook Color very soon, but one thing that stops me atm is battery life.
That's how I plan to use NC:
- games games games, online games included.
- surfing internet.
I thought NC can work off charge for at least 7 hours...
Qwenjis said:
I'm planning to buy Nook Color very soon, but one thing that stops me atm is battery life.
That's how I plan to use NC:
- games games games, online games included.
- surfing internet.
I thought NC can work off charge for at least 7 hours...
Click to expand...
Click to collapse
And chances are, once the bugs are worked out of CM7 so that battery drain is corrected and it correctly enters a sleep state, I'm sure it can/will.
Well, I actually meant hours with screen on while playing/surfing net. But yea, sleep mode is essential too.
Qwenjis said:
I'm planning to buy Nook Color very soon, but one thing that stops me atm is battery life.
That's how I plan to use NC:
- games games games, online games included.
- surfing internet.
I thought NC can work off charge for at least 7 hours...
Click to expand...
Click to collapse
8-10%/hr running, 2%/hr with the display off if wifi is enabled on CM7. So yes, it easily meets your requirements.
That's exactly what I needed. Thank you.
bluewhite79 said:
oh yeah, is there a wway to prevent apps from auo-launching??
Click to expand...
Click to collapse
Not sure if you read what the person below you posted, but I'll just say it here...Android has a built in task manager and using a task killer actually can make your device run slower and battery life much worse. I've had first hand experience with this with my droid.
JLCollier2005 said:
Not sure if you read what the person below you posted, but I'll just say it here...Android has a built in task manager and using a task killer actually can make your device run slower and battery life much worse. I've had first hand experience with this with my droid.
Click to expand...
Click to collapse
That wasn't the question he asked- He asked if you could stop something from launching, not how to kill it after it was launched.
CM7 RC4 Battery Life: "Just the facts, ma'am."
I can charge my Nook Color to 100%. Then reboot. Then immediately turn the screen off and let the device lay untouched for 24 hours. After 24 hours of no-touching I find my battery at 67%. I'll note that the wireless connection is not active upon unlocking the screen. It takes maybe 10-20 seconds for the wireless to reconnect. I have never, ever reset my battery statistics.
I don't have much installed on-top of CM7 RC4:
- Adobe Reader
- Google Finance
- Firefox
- Gmail
- Google maps
- NPR News
- Pandora
- Google Reader
- Rockplayer Lite
- Clockwork Mod ROM Manager
- Winamp
- Youtube
If any background process was started on the initial boot, I had nothing to do with it. That is, the process must have started automagically. I do not kill processes or applications. If I suspect something's gone badly then I always reboot to recover.
Editorial: I *-love-* CM7 RC4. For me it's stable, fast, movies play, Youtube works, etc, etc, etc. I likely would have re-gifted my Nook Color if not for CM7. I very much dislike my iPad. A lucky niece or nephew is going to be surprised with their next birthday present. ;-)
wpscully said:
I can charge my Nook Color to 100%. Then reboot. Then immediately turn the screen off and let the device lay untouched for 24 hours. After 24 hours of no-touching I find my battery at 67%. I'll note that the wireless connection is not active upon unlocking the screen. It takes maybe 10-20 seconds for the wireless to reconnect. I have never, ever reset my battery statistics.
I don't have much installed on-top of CM7 RC4:
- Adobe Reader
- Google Finance
- Firefox
- Gmail
- Google maps
- NPR News
- Pandora
- Google Reader
- Rockplayer Lite
- Clockwork Mod ROM Manager
- Winamp
- Youtube
If any background process was started on the initial boot, I had nothing to do with it. That is, the process must have started automagically. I do not kill processes or applications. If I suspect something's gone badly then I always reboot to recover.
Editorial: I *-love-* CM7 RC4. For me it's stable, fast, movies play, Youtube works, etc, etc, etc. I likely would have re-gifted my Nook Color if not for CM7. I very much dislike my iPad. A lucky niece or nephew is going to be surprised with their next birthday present. ;-)
Click to expand...
Click to collapse
I'm on nightly 98 but experience the same thing as you. Battery drains pretty quickly even when it's asleep.
Portugal. The Man said:
I'm on nightly 98 but experience the same thing as you. Battery drains pretty quickly even when it's asleep.
Click to expand...
Click to collapse
I am on N95, stock kernel, and finally have great battery life. Try using cpuspy and a paid install of system panel to find the cause of your battery drain. I see almost no battery drain when the screen is off and have about 50% deep sleep with an up time of 120 hours.
Sent from my NookColor using Tapatalk
noname4me said:
I am on N95, stock kernel, and finally have great battery life. Try using cpuspy and a paid install of system panel to find the cause of your battery drain. I see almost no battery drain when the screen is off and have about 50% deep sleep with an up time of 120 hours.
Sent from my NookColor using Tapatalk
Click to expand...
Click to collapse
I upgraded to n100 through Rom Manager, kept the stock kernel instead of using the OC'd kernel. When Rom Manager rebooted I was at 56%, I put it to sleep and have been periodically waking it to check the battery. Two hours later I'm still at 56%! Now since I changed the ROM version and the kernel, I'm not sure which one was to blame, but at this point, I'm leaving well enough alone.
edit:
Question: Say I wanted to go backwards to N95 from N100 --- would I just flash the N95 zip and then the gapps zip like a normal flash? Not that I want to right now because everything is fine, but I was just curious.
Hey,
I own 3 tablets and considerig the NC for the wife as #4
however I was wondering if anyone has done some specific battery tests for example:
1) How long from full to empty when reading a book?
2) On stand by
3) Off (you know you charge it on monday and dont go to use it until friday)
4) media play? (mp3, avi's etc)
5) light wifi internet use?
she will use it MOSTLY as an ereader however i will need to use an alt FW so she can load some of her nursing aapps (epocrates etc) but she HATES the 3 hour battery on her augen
For me, using strictly as a reader, it will last between 8 and 10 hours, depending largely on the screen brightness. For example, I have my screen brightness down to maybe 17-18% (roughly judging slider). I get around 8 hours there, but by setting the 'night mode', it bumps it up. As always, YMMV...
cool thanks
anyone else?
j
In my experience the biggest battery drain is WiFi so I leave it off most of the time. I usually leave the brightness at 25%. I also don't let the battery completely drain -- 10% is about as low as I go. So with those things in mind...
1. Reading: 9-10 hours
2. Stand-by: drops a few % each day
3. Off: I never turn it off completely but I would expect minimal battery loss
4. Media: I only play hardware decodeable media (MP4) and get 7-8 hours
5. Browsing: Not much experience but I would guess 6-7 hours
If you keep the stock rom, it would last longer. I have two. One is running cm7; and one is stock. The stock lasts way way longer.
Sent from my PC36100 using XDA App
I did a limited testing of video playback battery life only. 1.1 stock and CM7. If you find this interesting please provide your test results with your conditions. I did this testing to find what can make the best battery life in case I'm stuck with NC without power, like in plane.
Here are conditions, but keep in mind that the testing is far from being perfect, I could not make conditions exactly the same. I am a noob, after all, in March I got Nook Color and this is my first Android device. Should give some high level picture though.
1.5 hour 720x400 mp4 movie from SD card, restarted every hour (set up a timer for myself). Would love to find some automated environment.
Display brightness - ~18-20%, don't know the number, used only slider, tried to make brightness identical, but could make a mistake. This is to me a comfortable brightness to watch movie in room without sunlight or in airplane.
Tests:
1. 7 hours 15 minutes. New rooted stock 1.1 stock player (gallery), Wi-Fi on. (Wi-fi consumed 7% according to stats).
2. 6 hours 30 minutes. Stock 1.1, stock player, Wi-Fi off, Phone.apk and TelephonyProvider.apk renamed. The big difference with first test is that I installed bunch of free software (like 100 or so apps and games) and many probably were running in background automatically. I didn't know about autostarts then.
3. 7 hours ~20 minutes. CM 7.0.2 on eMMC, moboplayer, Wi-Fi off. Background processes suppressed by autostarts.
I disabled all widgets except Batteryleft (it doesn't seem to be accurate, BTW) and I'm using basic wallpaper. Nothing fancy.
Next time I will try to see what effect few dynamic widgets and live wallpaper will have.
So far my impression is that CM7 has almost as good battery life as stock 1.1 (maybe up to 5% lower, but that could be within margin of error, and that is OK with me). This is for active use, I know about sleep issues.
Note: Battery stats in CM7 show that display consumed ~50% of the power (47% is media server). This is too different from stock where I saw like 20% for display consumption with similar brightness. Different tools were used for sure. Anyway, looks like slight variation in brightness can affect battery life significantly.
Question: When nook shut down because of low battery, I wasn't looking at it. So, it's +- 5 minutes error. Is there a log file in Android to find when it exactly shut down?
Any comments are welcome.
I just bought a new Captivate (first android device) which I upgrade to from a Nokia E63. I've been playing around adjusting settings etc. and I noticed that my battery is more than 20% drained already! Is there something wrong with my model? If not, what can I do to save my battery for when I really need it?
If all you're doing is playing with it yes its gonna go down. Also depends on what programs is any you have running in the back ground. Furthermore if your wifi Bluetooth and GPS are all on there's another drainer. Last make sure you have the latest update. Usually the out of the box captivates don't have the 2.2 so use the kies program that's on the disk that came with it.
Sent from the dark forest on the way to Grandmas house from my captivate.
If the battery is new its going to drain quickly at the beginning, after a couple of recharges its going to get better. Other than that i would set the display brightness to auto and i'd download green power free from the market to toggle wifi/data and have it turn on for 1 minute every 15 minutes to save the battery.
i never understand why people complain about battery life cause i can go more than a day without charging, but here are some tricks. turn off wifi, and blue tooth. also under volt your cpu to save more power. also get a dark background because amold screens use no power when displaying black.
It is all in the way You use it.When you are surfing the net and just all around using the crap out of the phone battery life will be horrible. once the new smartphone phase wears out that battery life will come back up. On moderate use I get a day or better. on heavy use I get 4 to 7 hours maybe.
Sent from my SAMSUNG-SGH-I897 using XDA App
Big difference regarding the display technology between the two phones. It's the price you pay for the AMOLED.
Don't use auto brightness and keep the setting to its lowest if at all possible. An app called Screen Filter is helpful during night time reading.
Just make sure you let your battery drain until your phone shuts off and give it a full charge. You should be good from there.
Battery Dr is a good apparently. Just fyi
Sent from the dark forest on the way to Grandmas house from my captivate.
Morning all.
Something that has been slightly bothering me since I got this phone....it has a massive battery, it can be heavily customised with roms, xposed modules, magisk modules and all manner of tweaks. Probably one of the most open and dev-friendly devices I've ever had.
Yet, no matter what I do the only way I have ever been able to get more than 2 days out of a battery is to literally not use the phone.
I have had devices in the past such as Xperia Z3 Compact, S7 Active and others with smaller battery that were easily able to push 3 days with regular use. Hell, the Z3C was able to get up to 5 days with a little bit of trickery turning off radios when not in use etc.
Is the extra diagonal inch of screen realestate really enough to destroy the battery longevity? Typically with normal usage I am seeing 2 days with about 4.5 hours of screen-on time.
I've experimented with just about everything to push this out including no official facebook apps, decreased resolution, medium power-saving mode, kernel tweaks (currently using TGP rom and kernel), auto-sync turned off. Going beyond this I feel like you may as well just use a push-button device.
Any devs care to comment? What is the main factor that eats the battery on the Note 9? Is the exynos processor just not that power-efficient? Am I missing some hidden gem?
I guess the next step would be to transition to an AOSP based rom where the customisation is not constrained by baked-in samsung features but again, this is giving up a lot including proper s-pen functionality.
I recently kitted out an LG V30+ for my wife and it is just insane to me that a phone which only has a 3300mah battery can get the same life as the Note9 or better.
Is there some strategy I have missed or is this really the best we can hope for? Seems like an extremely inefficient use of 4000mah to me.
bandario said:
Morning all.
Something that has been slightly bothering me since I got this phone....it has a massive battery, it can be heavily customised with roms, xposed modules, magisk modules and all manner of tweaks. Probably one of the most open and dev-friendly devices I've ever had.
Yet, no matter what I do the only way I have ever been able to get more than 2 days out of a battery is to literally not use the phone.
I have had devices in the past such as Xperia Z3 Compact, S7 Active and others with smaller battery that were easily able to push 3 days with regular use. Hell, the Z3C was able to get up to 5 days with a little bit of trickery turning off radios when not in use etc.
Is the extra diagonal inch of screen realestate really enough to destroy the battery longevity? Typically with normal usage I am seeing 2 days with about 4.5 hours of screen-on time.
I've experimented with just about everything to push this out including no official facebook apps, decreased resolution, medium power-saving mode, kernel tweaks (currently using TGP rom and kernel), auto-sync turned off. Going beyond this I feel like you may as well just use a push-button device.
Any devs care to comment? What is the main factor that eats the battery on the Note 9? Is the exynos processor just not that power-efficient? Am I missing some hidden gem?
I guess the next step would be to transition to an AOSP based rom where the customisation is not constrained by baked-in samsung features but again, this is giving up a lot including proper s-pen functionality.
I recently kitted out an LG V30+ for my wife and it is just insane to me that a phone which only has a 3300mah battery can get the same life as the Note9 or better.
Is there some strategy I have missed or is this really the best we can hope for? Seems like an extremely inefficient use of 4000mah to me.
Click to expand...
Click to collapse
This is what you get when you use a high performance chip.
If it was like cars.. just because the gas tank is big (battery) doesn't mean that the engine won't consume the fuel faster than a more Efficient engine (cpu) with less power.
Other phones might be able to last 3 days, but they also dont have the performance capabilities. Turn on extreme power saving and see how long the phone lasts ...
I'm using stock unbranded ROM. I also adp uninstalled all the Facebook system apps (devil-ware). With Pie + OneUI + Night mode + Dark UI apps, it's the first time I love stock. I bet your non-stock ROM + TGP is the culprit.
I charge nightly on a wireless charge pad; easy on the battery. In Device Care, I run the default "Optimized" setting. I use it moderately for the first 12 hours of my working day (meetings phone calls), and I often have 85-90% charge left at that point. I then use the phone HEAVILY for the next 4 hours (watching video, reading, etc.), and at that point I am never below 50% (often 60-70) when I put it back on the charge pad, go to sleep, and start the whole thing over again. I have the US version (Snapdragon), darkmode and auto brightness is always on, and I use Automate to toggle my wifi off when not home and back on when home. Other than that, I have gps, bluetooth, and phone data always on. Bluetooth pairs with my watch and car, and gps auto-toggles by the kernel whenever I load maps or whenever my Life360 app updates my location (every few minutes).
That's all fairly normal use with a bit of power-savings thought into it. If you cannot get similar performance without your screen brightness jacked way up and wifi always on (that eats battery as you move around), then maybe you have a power-hungry app. Check your Device Care section of Settings, and start watching your "Usage by apps".
Also, it's better to slow-charge than fast-charge (wears it out more quickly). And you are better off charging nightly than waiting two days until it's very low.
gruuvin said:
I charge nightly on a wireless charge pad; easy on the battery. In Device Care, I run the default "Optimized" setting. I use it moderately for the first 12 hours of my working day (meetings phone calls), and I often have 85-90% charge left at that point. I then use the phone HEAVILY for the next 4 hours (watching video, reading, etc.), and at that point I am never below 50% (often 60-70) when I put it back on the charge pad, go to sleep, and start the whole thing over again. I have the US version (Snapdragon), darkmode and auto brightness is always on, and I use Automate to toggle my wifi off when not home and back on when home. Other than that, I have gps, bluetooth, and phone data always on. Bluetooth pairs with my watch and car, and gps auto-toggles by the kernel whenever I load maps or whenever my Life360 app updates my location (every few minutes).
That's all fairly normal use with a bit of power-savings thought into it. If you cannot get similar performance without your screen brightness jacked way up and wifi always on (that eats battery as you move around), then maybe you have a power-hungry app. Check your Device Care section of Settings, and start watching your "Usage by apps".
Also, it's better to slow-charge than fast-charge (wears it out more quickly). And you are better off charging nightly than waiting two days until it's very low.
Click to expand...
Click to collapse
A lot of people don't realize the huge difference that your cellular connection strength makes a difference on your battery.
Try working in a all brick/stone bank building, where 250kb/s is a good 4g download speed... Then see what your battery looks like after a few hours.
Bober_is_a_troll said:
A lot of people don't realize the huge difference that your cellular connection strength makes a difference on your battery.
Try working in a all brick/stone bank building, where 250kb/s is a good 4g download speed... Then see what your battery looks like after a few hours.
Click to expand...
Click to collapse
YEP!
And same goes for wifi.....
wifi and cell radios can really eat up battery if they are trying to maintain a connection in areas where wifi/phone signal is weak. And app like Tasker or Automate can toggle these on and off, depending on your location, and really save battery.
Well, that probably explains a few things. I moved in to a SOLID brick building recently with double glazing everywhere and multiple solid brick internal walls. First time I've ever battled for cell and wifi signal...that does explain a lot. I guess 2 days is still pretty good. Might end up with one of those 10,000mah Chinafones eventually ;p