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Basically, when I leave wi-fi on my phone has incredible battery life. If someone has already mentioned this feel free to bury this post, but to my knowledge it doesn't seem this has been posted yet.
With wi-fi off and 3g on
- Battery lost 5-6 percent per hour
Wi-fi on
- Battery lost 1-2 percent per hour (sometimes less than 1 percent depending on what your doing)
Right now after having my phone on for 34 hours my battery is still at 70 percent! I'm fairly certain this is because it disables the 3g radio altogether which apparently is a real battery hog. That or maybe my phone is just a fluke. I really don't know.
This also seems to be tied to the htc sense rom (correct me if im wrong) but if i remember correctly battery drainage increased when wifi was enabled in the stock rom. Currently, I'm using the latest htc sense rom from modaco, I'd really enjoy hearing if enabling wifi helps others extend their battery life.
your having better battery life with the Desire ROMs? that odd, my battery life with a Desire ROM was 20-30% worse compared to stock.
amlwaycooljr said:
Basically, when I leave wi-fi on my phone has incredible battery life. If someone has already mentioned this feel free to bury this post, but to my knowledge it doesn't seem this has been posted yet.
With wi-fi off and 3g on
- Battery lost 5-6 percent per hour
Wi-fi on
- Battery lost 1-2 percent per hour (sometimes less than 1 percent depending on what your doing)
Right now after having my phone on for 34 hours my battery is still at 70 percent! I'm fairly certain this is because it disables the 3g radio altogether which apparently is a real battery hog. That or maybe my phone is just a fluke. I really don't know.
This also seems to be tied to the htc sense rom (correct me if im wrong) but if i remember correctly battery drainage increased when wifi was enabled in the stock rom. Currently, I'm using the latest htc sense rom from modaco, I'd really enjoy hearing if enabling wifi helps others extend their battery life.
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Click to collapse
Actually, it's a well known fact that 3G uses more power on most (every?) phones than Wifi... so you're not alone.
Hey when you say WIFI on..do you mean WIFI and EDGE or did you completely disabled the radio?
I never would have thought having wifi on would extend battery life to such a great extent though, in most of the latest cell phone reviews and what not everyone recommends to have wifi off saves battery life but in this case just the opposite is true. I kinda knew the wifi was more efficient but I never expected such a large benefit from leaving wifi on all the time.
@ram130 I haven't actually touched the radios at all so I expect them all to be on or at the very least have edge on, I am able to receive and send calls and txt so I'm assuming at least some cell radio has to be on. All I did was use the htc sense rom and enable wifi.
The cellular radio is still on, but 3G/Edge (data) are disconnected. I don't know how Edge compares to Wifi, but 3G is a battery killer in comparison.
uansari1 said:
The cellular radio is still on, but 3G/Edge (data) are disconnected. I don't know how Edge compares to Wifi, but 3G is a battery killer in comparison.
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amlwaycooljr said:
I never would have thought having wifi on would extend battery life to such a great extent though, in most of the latest cell phone reviews and what not everyone recommends to have wifi off saves battery life but in this case just the opposite is true. I kinda knew the wifi was more efficient but I never expected such a large benefit from leaving wifi on all the time.
@ram130 I haven't actually touched the radios at all so I expect them all to be on or at the very least have edge on, I am able to receive and send calls and txt so I'm assuming at least some cell radio has to be on. All I did was use the htc sense rom and enable wifi.
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In other words you have "use 2G networks" checked right?
I'm gonna try this is now. I'm currently at 3hr 32m unplugged with 80% left. I have wifi enabled and on the stock rom. So I'll post back when I wake in a few a hours and see how it goes.
My only problem:
Wifi seems to disconnect alot during the hour regardless if sleep policy is set to NEVER. My wifi signal is -78dBm to -86dBm in my room and on channel 11(used wifi analyzer). Any suggestions why?
I have the same experience at home, I enable Wifi and leave the phone stay home for a couple of days and battery still 40%, when I go out and wifi is not connected, 3G kicks in and battery drops much faster.
I'm using cyanogen 5.0.4.1
Interesting. Did not know this!
I guess I won't feel so bad about leaving my phone on Wifi all day!
Also, does anyone know how much power is used by not having a radio signal and letting it constantly search? That seems to destroy my battery. But sometimes I am in an area with wifi but no radio access (deep within a building).
It's too bad this phone doesn't have UMA - that would make up for T-Mobile's lack of indoor coverage (at times), and probably improve battery life a lot in some cases.
But I have to say that on another phones I've used, especially WinMo devices, using WiFi instead of 3G seemed to always use more battery. But, it could very well be different on this phone...I'm definitely going to give this a try.
im not sure about the percentage but i agree,the battery drain is considerably more when searching for radio.im in a building most of the day and it doesnt take long.miss the UMA i had on my bberry.
Paul22000 said:
Interesting. Did not know this!
I guess I won't feel so bad about leaving my phone on Wifi all day!
Also, does anyone know how much power is used by not having a radio signal and letting it constantly search? That seems to destroy my battery. But sometimes I am in an area with wifi but no radio access (deep within a building).
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I also Get. About 25% better battery on wifi
Well after 10hrs of the phone being on stand by I woke up. It was at 46%!! my god. Anyway I checked my email, read an article all taking around 15mins and guess what? I had 30% left!. I put it back to stand by for 3hrs and took a look at it and had about 16% left...
It is now charging after one hour with just 10min use of downloading apps ..Can ANYONE tell me why my battery is draining so much on wifi? When its on EDGE for the night after 10hr I would have around 70% left from a full charge. Anyone can help me out here?
I shall be getting a replacement battery for free Tuesday.
Stock android.
ram130 said:
Well after 10hrs of the phone being on stand by I woke up. It was at 46%!! my god. Anyway I checked my email, read an article all taking around 15mins and guess what? I had 30% left!. I put it back to stand by for 3hrs and took a look at it and had about 16% left...
It is now charging after one hour with just 10min use of downloading apps ..Can ANYONE tell me why my battery is draining so much on wifi? When its on EDGE for the night after 10hr I would have around 70% left from a full charge. Anyone can help me out here?
I shall be getting a replacement battery for free Tuesday.
Stock android.
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Did you set your phone to only use 2G networks also? If you're not charging, wifi will probably disable after not being used for a while..so it's probably rolling to 3G if you haven't disabled it.
I'm not saying it's convenient to constantly switch back and forth... but this explains why it may not be a good test of the battery life the way you're running it.
uansari1 said:
Did you set your phone to only use 2G networks also? If you're not charging, wifi will probably disable after not being used for a while..so it's probably rolling to 3G if you haven't disabled it.
I'm not saying it's convenient to constantly switch back and forth... but this explains why it may not be a good test of the battery life the way you're running it.
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Click to collapse
Well yes I have it on 2G only. Any thing else could be contributing to it dying so fast?
Well I found a way to use my laptop as an AP. So I connected my N1 to it and getting full bars(-41dBm) in my room now. No wifi disconnects so far!(maybe it was my linksys before ?).. So far the battery is at 86% with some 3D games, been unplug for 1hr 50min now. I'll put it to stand by now and see how it looks after 10hrs.
I'm on a stock firmware(not rooted). 2G only selected.
The way I understand it is as follows:
Phone is on STANDBY:
3g==2g* which are both more efficient then wifi (that's why the default wifi policy turns wifi off if it's not being used)**
Phone is ACTIVE:
wifi is more efficient then 2g/3g because:
1) It's waaay faster and thus causes less battery drain* and
2) The AP (router) is much closer to the phone then the cell tower so in theory it doesn't need to use as much power to talk to the router.
*http://code.google.com/events/io/2009/sessions/CodingLifeBatteryLife.html
4:45min into it there is a power usage chart and 3G/EDGE idle power usage is about the same - also somewhere else in the video they talk about wifi vs 3g usage when transferring data.
** http://code.google.com/p/sipdroid/wiki/NewStandbyTechnique
States that 3g standby is more efficient then wifi
drak0 said:
** http://code.google.com/p/sipdroid/wiki/NewStandbyTechnique
States that 3g standby is more efficient then wifi
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Click to collapse
Someone needs to test this ok. ...already testing wifi
Ok I'm at 11hrs 30min on wifi and its at 67% with light usage(checking email, news for 5min)..improvement? kinda, because since turning off my laptop it switched back to getting low signal(-81dBm) from the router in the next room. Weird? I'm still thinking. anyway I'm heading out so gonna use the phone more today, lets see if it gets me through the day.
Still no where near the thread starter 30hrs!! Maybe stock really sucks? bad battery anyone??
@ram130 I'm not sure how my battery is lasting as long as it has so far. I'm up to what would be an insane number, 65 hours 36 percent left .. this battery just wont die. I haven't the slightest idea how it's lasting this long I just leave wifi on all the time and turn wifi standby off. If anyone could explain how leaving wifi on more than quadruples my battery life I'd sure love to know.
I've been seeing a lot of posts on crap battery life around here, and I was chasing my tail about some of them as well, following a lot of misinformation even by senior members. I think I have a good handle on it now, and picked up most of these tips from these forums, so I'm not taking credit for these ideas, just collecting them in one place. Some of my suggestions assume you have root and Rom Manager (see the Tips and Tricks sticky thread on how to get them).
1. If your battery drains in less than a day on standby, you probably have a bad flash of the JI6 modem (either from the OTA update or from a ROM). Flash the JI2 modem from here "www dot teamwhiskey dot com/home/downloads". If the flash fixes it, you may try going back to JI6 if you want, and it may stay fixed. I went back to JI2 and didn't bother going back to JI6, but it has worked for others. With JI2 and 3G on I get just over 24 hours in normal usage.
2. The #2 battery drain on standby is 3G. I turned it off (Settings/Wireless/Mobile networks/Network mode/GSM only) and my phone lasted for 40 hours on Edge with light usage (few phone calls, messaging, quite a lot of web surfing, 2 hours of podcasts). Didn't even feel too slow (I get 140kbps on edge). Can anybody suggest a really good widget for turning 3G on/off? I use the 2G-3G OnOff widget by Curvefish. It's not one-click, it's just a shortcut to Mobile Network Settings, but it works. Note that sometimes it takes a while for the data connection to re-establish after you see the 3G or E icon.
2.5. WiFi always on is a huge battery saver! It keeps 3g off. I can easily get 3+ days with light usage on my home wifi. Settings/Wireless and Network/Wifi Settings/Menu/Advanced/Wifi Sleep Policy/Never.
3. Don't need a task killer. I wasted all my time killing tasks trying to chase down my crappy battery usage, but since I fixed my modem and turned off 3G I know that the 3-5% CPU usage at idle does not hurt my battery. Taskiller for me was actually hitting the CPU constantly, lightly but for no reason, so I got pissed and uninstalled it.
4. Install a CPU usage monitor like Usage Timelines. It sits in the notification bar, very easy on the battery, but tells you if you have a rogue app pegging your CPU and draining your battery. These are the only apps you should be worried about killing. Astro File Manager has a task manager that shows CPU usage for each app, so you can kill the rogue one. I shoot for about 5% cpu usage at idle (at 200mhz - at 100mhz it would be a bit higher).
5. The app Autostarts lets you disable any app from starting on boot or other events like connectivity changes. This is not strictly necessary unless you have a lot of crap apps installed on your phone and they like to start themselves and waste CPU time behind your back.
6. If your battery reads less than 100% as soon as you unplug it from the charger fully charged, or your battery meter sits at 100% for a long time after you unplug it, you can recalibrate your battery meter. To recalibrate: 1) charge your battery to full, 2) unplug, 3) reboot into Clockwork Recovery and 4) Wipe battery stats.
7. There is No Such Thing as "battery reconditioning" (for all intents and purposes). The above procedure only RECALIBRATES you battery METER to read on a more linear scale between full and empty. It DOES NOT make your battery last longer, period. Whoever tells you that is a moron. If your battery is dying in 6 hours, doing any amount of calibration will not make it last longer (I've tried).
8. I wouldn't be too worried about undervolting, overclocking, kernel tricks and superawesomefast ROMS. The CPU drain at idle is so minuscule (as long as you don't have rogue apps) that those things make precious little difference. Like I said, the biggest drain is 3G and other radios. Having said that, I run Bionix 1.9 with the JAC kernel. It drained my battery in half a day at idle until I flashed the JI2 modem. With JI2 it suddenly started lasting over 24 hours, and once I turned off 3G, over 40 hours. I like this ROM and see no need to switch, it's very smooth. But you should be able to get similar battery life on a stock Vibrant.
9. I have GPS on, WiFi never sleep, auto-brightness, and a few widgets on like Weather and friend updates. I have no fancy settings, literally just turning off 3G (or wifi on, which is the same) got me 2-3 days. So I wouldn't waste time fooling around with magic settings (other than wifi never sleep), battery saver apps, etc.
10. If your screen is on all the time and you're playing games nonstop, you're draining your battery quicker than any of the things I mentioned above, so you probably don't care. In that case an optimized ROM/kernel is probably your best bet, especially JIT in Froyo. You can probably save on screen brightness as well.
If you guys have any other tips I'd be glad to add them to the list, but I hope this gives you an understanding of where your battery life is going. Basically: bad modem, 3G, or rogue apps.
Also, I hope this will put an end to trolls calling people whiners for complaining about battery life and saying unproductive **** like "you're a whiner" or "the Galaxy S is just a battery hog, live with it". It's not, you don't have to live with it, nobody should have to, here are your solutions.
Good luck.
A few things I do to help with battery life is:
Disable Audible touch tones
Disable Audible selection
Disable Haptic feedback
Disable SD card notifications
Set animations to NO animations
Uninstall media hub if you dont use it
Disable auto brightness adjustment
Disable power saving mode
I disable the last 2 and just swipe the notification bar to adjust brightness. Granted these items really only work when using the phone but I can go about 2 days of normal use without a charge believe it or not.
yeah disabling 3g has always been the best option for people really, really concerned with battery life.
But it's kinda hard to tell people not to use 3g on their brand new 3g capable devices.
You may want to add how to test if you battery is bad. If you use you phone repeatedly while it its plugged in you risk overheating and damaging your battery. Signs that unitas is the case are very quick drain and long (7 hours) charge times. You can easily test and see if your battery its damaged. Remove it from your phone and place on flat surface (e.g. Counter top) try spinning the battery. If it rotates easily and quickly you battery is bulging, this is a sign of damage. Time for a new battery.
Sent from my SGH-T959 using XDA App
Answer to #2-
Use APNDroid. Comes with a widget.
Thanks to the OP and other contributors in this thread.
I flashed a ROM with the ji6 modem and battery life has been noticeably ****ty since. Example - this morning I unplugged my phone at 7:30 am. 100% charged. It's 10:21 am and my phone is at 75%
In the last 3 hours I browsed the web for 10 minutes while having my coffee and a smoke before heading out to work. Blue tooth was on for my drive, and I've sent 2 text messages. Aside from that my phone has been on stand-by since I unplugged it 3 hours ago.
I'm going to try to flash back to ji2 tonight as the battery usage was definitely better. Will also look into the 3G thing.
Thanks again.
You forgot to mention the two DRM and one downloader services that run resident on JI6.
These were the cause of my reduced battery life after I upgraded. Killing & removing these processes restored my battery life back to normal
blink55184 said:
Answer to #2-
Use APNDroid. Comes with a widget.
Click to expand...
Click to collapse
I just tried this - switching 3G off works fine, but switching 3G back on didn't work for me. I had to re-boot to get 3G back so this is a no-go in my case.
I know how to kill the processes for the DRM and downloader but how do I remove them?
OP thank you for putting together the list. But I've never seen the point of doing all this. Its like getting a lamborghini and only driving 40mph because it you don't want to waste gas, whats the point? Either get a second wall charger to charge at work or a car charger. Heck even get a second battery if you are out for a long period of time.
speoples20 said:
Its like getting a lamborghini and only driving 40mph because it you don't want to waste gas, whats the point?
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Click to collapse
You don't need to disable 3g.
The point of my post is to avoid people wasting their time with tweaks that have little to no effect on battery life. I'm telling people that they're wasting time killing apps and optimizing cpu usage and twiddling their settings when the radio drains most of their battery on standby anyway.
Meaning no matter what changes you make, you can only hope to improve your battery life by a tiny amount, because any other effect is overshadowed by 3G.
Put another way, you will NEVER get battery life much longer than a day if you're on 3g, so you're wasting your energy trying all kinds of tricks.
blink55184 said:
Answer to #2-
Use APNDroid. Comes with a widget.
smutek said:
I just tried this - switching 3G off works fine, but switching 3G back on didn't work for me. I had to re-boot to get 3G back so this is a no-go in my case.
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Click to collapse
For me the widget did nothing. But it seems like it's not even supposed to turn the 3G radio off, but ALL APN network traffic. Did I miss something? It won't save battery power as long as the 3G radio is on.
I went back to the 2G-3G OnOff widget by Curvefish. It's not one-click, it's just a shortcut to Mobile Network Settings, but it works. Note that sometimes it takes a while for the data connection to re-establish after you see the 3G or E icon.
Back to my Moto Startac
While i understand the idea behind this thread, your conclusion is simple.
If you use the phone as a smartphone, it will eat up your battery no matter what.
I personally go through two batteries and some a day. (they cost about 12 bucks in ebay, and they work just fine)
The price for saving battery is not using the phone, and having a 400 bucks phone just for show off is just silly at least.
If you have a phone like this is to use it. At least you can change the battery not like some other devices......
I understand that task killer is useless, but do any of you use Autokiller (memory manager) ?
That's kind of a redundant question because even if you do not use the app, your phone is still performing the functions. The app just adjusts the settings. But to answer your question, using a memory optimization tool such as AutoKiller is 1000% more efficient than using a Task Killer. I don't think it effects battery much, but works wonders on performance.
There's no 3g-off widget because apparently in Android there's no way to do that through a direct command. I also use the Curvefish widget, and you are absolutely right about turning off 3g to save battery. I normally do so when I'm asleep or if I'm sitting at my desk next to a computer (why do I need fast data on my phone when I have my computer right here?).
The other thing I would recommend is AutoStarts. There are way too many apps that open themselves up at bizarre and inappropriate times. Autostarts is an easy and painless way to see which apps do this and keep them from opening.
gagb1967 said:
While i understand the idea behind this thread, your conclusion is simple.
If you use the phone as a smartphone, it will eat up your battery no matter what.
I personally go through two batteries and some a day. (they cost about 12 bucks in ebay, and they work just fine)
The price for saving battery is not using the phone, and having a 400 bucks phone just for show off is just silly at least.
If you have a phone like this is to use it. At least you can change the battery not like some other devices......
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+1000
Great battery life comes to people who hardly use their phones. Guess I need to get a netbook. Will prolly get a netbook or 3g laptop + skype and ETF my phone soon. These battery woes are show-stopping.
Sent from my SGH-T959 using XDA App
Losing 4% an hour on standby when you're not using the phone is unacceptable. Samsung screwed something up with the JI6 update. Most people think it's because of the stupid Media Hub. I think they are right.
People are not complaining about the poor battery life from using the phone. They are complaining about the slow battery drain even when they are not using it. ~4% an hour adds up fast. Vibrant is supposed to have 450 hour (18 days) stand-by time. That's what is rated. But people are getting 24 hour (1 day) stand-by time after JI6.
Yellow C6 said:
Losing 4% an hour on standby when you're not using the phone is unacceptable. Samsung screwed something up with the JI6 update. Most people think it's because of the stupid Media Hub. I think they are right.
Click to expand...
Click to collapse
I'm not ready to sign off on this idea. For me simply flashing JI2 over JI6 fixed it. For some people flashing JI6 back over still left the problem fixed. I still have those processes running on JI2 and my battery life is fine.
The other reason I'm not ready to recommend wiping out those DRM processes is that apparently it stops the bundled Avatar movie from playing, and might affect other things that users may get pissed about. I've read that killing the downloader process people are talking about kills the market. So I really wish those people advocating that solution would figure their **** out and provide exact steps for the fix (right now their posts are really vague like "kill the processes that are named something like this" and not well tested; in all my research I didn't find the exact name of the "downloader" process).
Is it possible to flash the ji2 modem without root? Wishful thinking, I suppose..
Is the "Acer Iconia Battery Saver" app (sorry, not allowed to post links yet) useful at all or is it obsolete if on HC 3.1 and higher?
My understanding is that it is all about disabling phone.apk and telephony.apk (by renaming or moving from /system/app to some backup location) so that there is no battery juice wasted on the cell signal discovery in our Wifi only A500 models.
I am running stock 3.1 ROM and I see that those apps (phone and telephony) are present in /system/app (both 'apk' and 'odex') and yet I do not see anything in the "battery use" statistics about consumption by cell service. Does it mean that those apps are already disabled and therefore "Acer Iconia Battery Saver" (or disabling of phone.apk and telephony.apk tick) is obsolete and unnecessary.
I know people were reporting good results with "Acer Iconia Battery Saver" app earlier on when they were still running it on 3.0 (and yes they saw cell usage in the battery use stats).
But is it relevant now? Thanks in advance for your replies....
Since all reports of 'improved battery life' from removing those apps is circumstantial, it is about as relevant now as it was back then.
It is my opinion that there could be no battery usage if there was no hardware there to begin with. It was a ghost stat and hence had no effect on battery life.
Of course people will disagree but since no quantifiable data exists, (that isn't based solely on personal opinion and uncontrolled tests) the argument is kind of moot.
Well, I hear your point. And that is why I am trying to get to the bottom of this.
I understand your point about if cell hardware is absent then there should not be any battery drain to begin with. However, it is not completely accurate. The running software could easily account for the drain. Theoretically, if those two apps constantly run trying to ping the supporting cell hardware, that will still waste some battery (and maybe significantly so if, as some reports claim, the ping algorithm implemented in such a way that it is very aggressive about trying to detect the signal while it is absent).
Also, it is strange that people who reported the battery life improvement from using "Acer Iconia Battery Saver" or the hack (by manually removing phone.apk and telephone.apk) claimed that while they DID see the appropriate consumption entry ("cell usage" or something like that) in the battery usage stats before the the same entry disappeared after they implemented the hack or deployed the saver app. Of course, maybe it is a red herring after all.
Anybody, who actually tried the saver app or implemented the hack cares to clarify?
I have a rock here. It claims to ward away bears from attacking me in my sleep.
No bears have attacked me in my sleep ergo, the rock must work.
You cite unsubstantiated claims. Again, there is no quantifiable data that proves removing telephony/phone.apk had any affect on battery life.
Polling nothing with nothing = nothing.
While yes, running software can certainly account for *some* drain but, more to the point, its the LCD panel not the application itself (baring any serious CPU intensive apps or memory polling) that chewing through juice. Hardware use is really the only way to drain the battery in any significant way. Having Maps sitting on stand-by (which you didn't launch) with Wifi off will not drain your battery of any significant amount in the same way that telephony/phone.apk on standby would if there is no hardware there for it.
Considering those ghost stats were showing 45 - 48% battery use, the return now that it's gone doesn't add up. Even a tech rep told me of the tests he did there was less than a 0.2 return in battery life. That's an insignificant amount.
Android OS juggles memory and stand-by applications from one end of the spectrum to the other with little to no difference in battery life. Force closing background apps (and saved-states) that HC has put into standby will net you nothing but a high risk of instability.
bingo bango?
Surgar in the gas tank.
I to agree with gamma.the standby could have been using some CPU cycles.but very little.I have-not seen any change in battery life now that it's gone.
I think that you would really see a lot more battery savings using apps like SetCPU, Brightness Level or even by setting your wallpaper to be something darker and definitely not a live wallpaper. Since the screen is really the main battery user I tend to be very picky about the brightness level and that is why I use a widget to be able to control the setting easily. With that said, if getting rid of these 2 phone apps will save some battery then let me know.
I just use airplane mode then turn wireless back on. Sounds like a winner don't it?
Sent from my Acer Iconia A500 running HoneyVillain 1.1 HC 3.2 for A501, OC'd 1.5GHz
highly doubt it makes a diff
You can always just edit /system/build.prop and add ro.carrier=wifi-only to the file - done this on my current rom, but I cannot say I see any evidence for increased performance / better battery life. Who knows; without a controlled test any evidence via personal revelation is pretty meaningless.
I was having battery issues and used BetterBatteryStats to hunt done the app that was using my battery. It isn't a free app but well worth the cost. Be sure and read the FAQ
https://market.android.com/details?id=com.asksven.betterbatterystats
Was wondering about this too
I am fairly new to the android world but after some reading i finally put honeyvillian and the kernel on my acer and was noticing it said please install SIM card. i looked in settings > about tablet > Battery use and it said Cell Service 20%!!!!!!!!! after alot of searching and reading i found out about the ro.carrier=wifi-only thing in system/build.prop i just changed it tablet booted just fine now just waitin to see if it helps my poor battery. Cell Service is gone from the list in settings now tho so hopefully it will be ok
So Charged iconia last night to full started using at around 8AM its currently 7:39 charge is at 26% I have been using it alot during these 11.5 Hrs did take an hour nap and left it on. definately helped use to have to charge before now. Although i do hear of ppl whos will run for days without being charged kinda makes me wonder how much they really use it in those few days tho? I am really using it tho to play music download stuff still in process of gettin it just the way i want it too so that may be another reason it doesnt last forever.
I just got a new A500 last week and I looked after starting it and while it was running 3.0.1 and the battery status did show Cell Phone using the battery towards the top of the list.
Upgraded to 3.1 and checked again and there is no mention of the Cell Phone using the battery so it appears that the issue was fixed in 3.1
lk757 said:
Is the "Acer Iconia Battery Saver" app (sorry, not allowed to post links yet) useful at all or is it obsolete if on HC 3.1 and higher?
My understanding is that it is all about disabling phone.apk and telephony.apk (by renaming or moving from /system/app to some backup location) so that there is no battery juice wasted on the cell signal discovery in our Wifi only A500 models.
I am running stock 3.1 ROM and I see that those apps (phone and telephony) are present in /system/app (both 'apk' and 'odex') and yet I do not see anything in the "battery use" statistics about consumption by cell service. Does it mean that those apps are already disabled and therefore "Acer Iconia Battery Saver" (or disabling of phone.apk and telephony.apk tick) is obsolete and unnecessary.
I know people were reporting good results with "Acer Iconia Battery Saver" app earlier on when they were still running it on 3.0 (and yes they saw cell usage in the battery use stats).
But is it relevant now? Thanks in advance for your replies....
Click to expand...
Click to collapse
I bought the battery saver app and it made absolutely no difference. I don't mind sacrificinga dollar to experiment, but the experiment is done. Save your dollar. Edit your build.prop
About a month ago, I was running RoyalGinger 3.0 with bluetooth, GPS, and background data disabled, and I was only using my home wifi to get online. My phone would pretty much hold a 100% charge for 5-8 hours if I left the screen off. I was pretty amazed at my battery life. Then I decided I wanted to try a different rom, so I backed up in CWM and did that. When I returned to RoyalGinger, my phone wasn't holding the 100% charge for as long anymore and hasn't done it since then (yes, I did re-calibrate the battery, like twice at least).
Recently though, my phone has been having horrible battery life under the same conditions. The only difference is that now I use LauncherPro instead of the stock launcher. I'll charge to 100% + 15 minutes or so, and with the screen off, the phone divebombs to about 95% within an hour and a half. If I actually use the phone, it will lose 30% in 2 hours. I have no idea what the problem could be since I don't have any data-syncing apps in the background and I'm really just texting people.
Any ideas?
The consumption doesn't sound like anything out of normal. A difference in signal quality (radio or WiFi) or using radio for data instead of WiFi can cause that.
In any case, just check the apps that use your battery, and see that you don't have any process getting CPU stuck on 100% (you can see CPU load in System Panel Lite, for example).
Download the apps below.....this will help you out.....
Use the app SetCPU for Root Users
It allows control of certain aspects of the Linux cpu freq driver, allowing for overclocking, underclocking, or tweaking speeds and settings. Download it here.
Use the app Battery Booster
Battery Booster is a powerful battery boosting tool and power management application specially designed for Android devices. Download it here.
Always remember to remove the charger immediately when the battery level reach 100% for longer battery life.
As the title says, does rooting the NST affect the battery life at all?
What about using another e-reader app, say the kindle app, in comparison to the battery usage of the default reader?
And also that crazy NoRefresh app that I saw. What is the affect of the battery life with it enabled?
I can say it running like crazy
The battery went down to 40% for one day uses.
I have many email accounts on the sync though.
GoldenStake said:
As the title says, does rooting the NST affect the battery life at all?
Click to expand...
Click to collapse
I've been running rooted for a few weeks now. I don't think rooting, per se, affects battery life so much as what you do with it.
Out of the box, the NST uses very little power. If you leave wifi off, it will last quite a long time. The minute you start loading up anything that wakes the unit up, or that turns on and uses wifi, battery life drops. Since it normally uses so little power, the drop seems quite dramatic.
Here are some rough and very unscientific numbers based on my usage:
Unit off with wifi off: 2% battery consumption per 6 hours.
Unit off with wifi on: 2% battery consumption per hour.
Unit on and in use with wifi on: 4-6% battery consumption per hour.
I haven't really let it sit long enough to really validate these, but they give you an idea. I'd expect to get a week to 10 days out of it with "typical" usage, and probably much more. Part of the problem of bench-marking this thing is how quickly it charges up, even when I only connect for a few minutes to side-load some books.
I use Tasker to turn wifi off unless a very small group of apps are running, and shut it off when they exit.
If you keep anything from polling, don't use active widgets and turn wifi off when not needed, you should get more out of it than most any other device you own. Watch out for things that hang in the background. I was once downloading some files from the Market and it hung, so I lost a lot of power overnight. If you load up with active wallpapers, widgets and/or apps that poll in the background, expect to see it using the battery quickly.
I charge every 4 days, but that's because I use it without wifi unless I am getting an app or something. But that's just me.
In my experience the battery life got worse after initial rooting. It is noticeable. Rooting itself has nothing to do with it.
The biggest offenders are apps installed in the process. I removed most of apps that either worthless for me or attempt using internet frequently. I don't think I need google on a book reader. The reader does not provide any privacy, even password protection. I removed everything related to google. Apps can be sideloaded if necessary.
Free SuperManager is a very good apps for managing the reader but free version tends to use internet too much.
Now the battery life is back to what it supposed to be. Rooting is only useful for me for gaining control and access to the web browser if there are no alternatives. NT is just a reader and a nice one.
My Nook died afer 3 days of intense exploring (wifi on non-stop).
I've spent approx. 6h/day on it.
But it's a pretty nice result IMO.
I think rooting does't really effect battery life by itself. I've checked battery life log on NookTouchTools (an app) and it says 77% was drained by display, but i cant compare it to non rooted version.
I've seen battery drain vary enormously from not dropping at all to dropping precipitously with normal off (not completely powered down) and WiFi shut off. I think that the only really way to get a handle on this is to put a milliampmeter in the battery circuit and measure in real time the current drain.
I do know that if you have the WiFi on you can still ADB to the Nook even when it is "off". You can even start apps!