Database Develop

[Q] Battery Issues / Questions

I read through quite a few of the battery issue threads but would still appreciate specifc advice on the issue I am having with mine.
I already couple times did the stats wipe as per the tweak guide on OT site but do not seem to have any benefit from doing it.
I am encountering the following issues:
Charging
Charging is very finiky. If i am charging in operation or while turned of the tab will seem to stop charging at certain levels of charge between 70% and 95%. If it happens while charging turned off I need to disconnect and reconnect in order to coninue charging, sometimes a few times.
If it happens when in operation similar will happen but also when the charge is reported at 100% I tun off the tab only to find out that the charge level reported by the off battery icon is not 100%. On different occasions it displlayed anywhere from 80 to 95% (estimated). Dont remember ever seeing it at 100%.
Discharging
If I turn on flight mode overnight I will get almost no discharge all night 0%-1% which seems very cool but my normal use is really wireless thethering. I just started not even 10 minutes ago from 100% charge and already at down to 90%. Just playing a game or browsing or reading the forum using the XDA app can completely discharge the battery in less than 2-3 hours. All of this in spite of the fact that I am on Jupiter, UC and UV heavily. I also manualy been stopping running services like skype and yahoo messenger.
I am afraid this could be a a battery hardware issue but would appreciate a confirmation or a suggestion of what else I can try before restocking and going to the service center to get the battery replaced.
Maybe you could advise which system apps I can freeze with Titanium and still be able to maintain wireless tethering and phone functions. Maybe an advice on a task killer and what I can and can't kill to keep the mentioned functionality.
While writing this post I lost 8% charge!!!

Dont get any task killers they kill system process then the system has restart them which kill battery. Have you tried wiping batterystat.bin when below 10% and charging to 100% while powered off.
Sent from my GT-P1000 using XDA Premium App

Or try backing up data and restocking and installing the WIPE version of
Jupiter or of kratos.
Sent from my GT-P1000 using XDA Premium App

aliaksei said:
Or try backing up data and restocking and installing the WIPE version of
Jupiter or of kratos.
Sent from my GT-P1000 using XDA Premium App
Click to expand...
Click to collapse
thanks mate, I always restock and do the wipe version. currently on Jupiter and will soon be moving over to Kratos. Reading good stuff about it.
aliaksei said:
Dont get any task killers they kill system process then the system has restart them which kill battery. Have you tried wiping batterystat.bin when below 10% and charging to 100% while powered off.
Sent from my GT-P1000 using XDA Premium App
Click to expand...
Click to collapse
The only way I would install a task killer would be if I could get someone to tell me which tasks to ignore so I wouldnt get this issue. No have not tried the below 10% wipe but will do so since you mentioned it. In the Kratos thread somebody mentioned to let it completely discharge and then without connecting to boot into CWM and let it further discharge. Aparently a system full discharge is not a full discharge and there is another couple hours juice left in the battery to keep the CWM going. Would this be a good idea?

Thanks to the helpers and to all you readers I think I found the issue. It seems to be a hardware problem but not with the Tab. The problem was with the charger.
I accidentally came across a car charger, bought it, used it to partially top up a couple times in the car and right away the Tab seemed a bit different. So I went back and bought a mains charger plugged it in last night and for the first time in quite a while it charged to 100% and it happened within expected time. Put it on charge at 1.30am and it was at 100% at 5.30am when I woke up.
Dont think it will effect the drain much but it is definitely giving me more juice to start with.

Oops!
Sent from my GT-P1000 using XDA Premium App

After running Kratos for quite a while with my new chargers and recalibrating by the book I am getting the expected level of battery juice. The tab charges efficiently to100% every time.
Drain is still an issue for me though. If i set airplane mode overnight (8hours) it will loose 1% charge but 9%-10% without airplane mode. On standby and in use the drain is consistant and fast. Not even UC and agressive UV helps.
I did a lot of app freezing and it realy doesn't make a major difference. Normaly I have only 4 services running. Settings, Google Services, AnySoftKeyboard and Google Maps.
I don't think I had the same drain on Hermes even though i didnt UC, UV and had at least a dozen services running. Think my battery life was better while others were complaining about wifi reconnection issues. ASAP I will try going back to Hermes to either confirm the issue with Jupiter/Kratos or to just accept this as normal and shut up.
Sent from my GT-P1000 (Overcome, Kratos) using XDA App

I finaly narrowed down the battery issue.
When on wi-fi i will get up to 3 days of battery life but only up to 16 hours on 3G.
It has been suggested to change the modem. I am curently on JPZ. My GT-P1000 was originaly purchased in Saudi and currently, until my next contract who knows where in the world, using it in Croatia.
A suggestion on the most battery efficient modem that works globaly would be appreciated.
Sent off the Blue Marble using GT-P1000 on Kratos via XDA App

MutantWizard said:
I finaly narrowed down the battery issue.
When on wi-fi i will get up to 3 days of battery life but only up to 16 hours on 3G.
It has been suggested to change the modem. I am curently on JPZ. My GT-P1000 was originaly purchased in Saudi and currently, until my next contract who knows where in the world, using it in Croatia.
A suggestion on the most battery efficient modem that works globaly would be appreciated.
Sent off the Blue Marble using GT-P1000 on Kratos via XDA App
Click to expand...
Click to collapse
FYI - Kratos Overcome ROM has(or had, there's a new one out today and it might fix this?) a bug with wifi where that if you leave the network and then reenter it without manually turning off then on the wifi, it will constantly reconnect(or something) and burn battery like mad.
For now I just flip the wifi off/on again when i connect to a new wifi since i didn't want to leave Overcome. Hopefully the new one fixes it.
---------- Post added at 07:05 AM ---------- Previous post was at 07:04 AM ----------
and by leave/reenter network, i mean physically walking outside the network range until it disconnects, not disconnect/reconnect through the tab settings.
It may only happen moving from one network to another (i go from home wifi to work wifi to home wifi each day).

Mate thanks for the reply but think you misunderstood. I dont have an issue with wifi. My issue is with 3G/mobile network over SIM card. That one burns the battery.
Sent off the Blue Marble using GT-P1000 on Kratos via XDA App

darkmattar said:
FYI - Kratos Overcome ROM has(or had, there's a new one out today and it might fix this?) a bug with wifi where that if you leave the network and then reenter it without manually turning off then on the wifi, it will constantly reconnect(or something) and burn battery like mad.
For now I just flip the wifi off/on again when i connect to a new wifi since i didn't want to leave Overcome. Hopefully the new one fixes it.
---------- Post added at 07:05 AM ---------- Previous post was at 07:04 AM ----------
and by leave/reenter network, i mean physically walking outside the network range until it disconnects, not disconnect/reconnect through the tab settings.
It may only happen moving from one network to another (i go from home wifi to work wifi to home wifi each day).
Click to expand...
Click to collapse
So to understand what you are saying explicitly.
At home I connect to WIFI -- XXZ.. Its already a remembered network. I drive away from home and come to office here WIFI is YYZ (Already remembered network). So it automatically connects. THIS CAUSES the batt drain????
If yes, I am extremely happy. Coz I dont turn off WIFI it connects at home n office automatically. Please corroborate!
Al

> I finaly narrowed down the battery issue. When on wi-fi i will get up to 3 days of battery life but only up to 16 hours on 3G.
I think that is normal standard consumption. 3G is known battery hog and you cannot compare its runtime vs. wifi. Is 3G on all the time, or maybe you attempted to use interval disconnectors (ie. battery saver apps) like JuiceDefender, Green Power, the likes?

Thanks jtdc!
I move around the world a lot and rarely set up wifi so most of the time I am full time on 3G. I dont use any power saving tools like you mentioned. Insted I use Titanium to freeze any apps that unnecessarily show up in running services.
I only noticed the differwnce with wifi due to an exteded visit with a relative who has wifi in his house. It wont be long and I will again be full time on 3G and would realy like to extend the battery life by minimum 4 hours. Are you aware if there is a known difference in power consumption between different modems or if any of the tools you mentioned can deliver this kind of savings purely by managing the 3G operation?
Sent off the Blue Marble using GT-P1000 on Overcome 7, v4 via XDA App

if any difference of modems that would be minimal to negligible. what always comes as the factor is the strength of signal and of course the tab which always scans for it whenever you're on the move. what you experience is typical, and in best case good because 16 hours on 3G always on? your battery and tab must have been setup really well.
if you can bear with interval disconnector apps like i mentioned, it would increase your runtime. for instance you can have the app connect every 15 minutes to 3G then be online for at least a minute to have all your internet dependent apps sync (email, messages, news, etc) and have traffic threshold detection in case in a minute some transfer still ongoing, then maybe 2 minutes is long enough. then for the next 15 mins 3G is off, then it will repeat the cycle. in that manner there's quite a lot of power to be saved and will definitely extend your runtime.
if really no other choice, i suppose you need to buy an external battery solution, the likes of energizer xpal, so you won't have to worry about battery life.

Great, thanks, that solution is acceptable for apps that require data services. Can you recomend an app to use for setting it up.
I expect it would prevent me from using inbound calls via Skype but how would using such an app impact incoming sms service and voce calls? Would they come through and would voice call quality be impacted.
Sent off the Blue Marble using GT-P1000 on Overcome 7 v4 via XDA App

"Green Power" in android market does the job and its free, that takes care of data connections (wifi or 3G) and will not tinker with the GSM radio, therefore sms and voice calls are untouched. The other app "Juice Defender" you can customize even to turn off the GSM radio, even downlclock the cpu, etc. which will result more savings but is a paid app.
Let us know how that helped to increase your runtime

Cell standby killing my battery

I have a problem with cell standby killing my battery. Its the single highest.used thing that is draining my battery (its over 30% and only other thing in that ballpark is the display) . The only mods I have added to stock is droidjunks power toggles. It seems like every time I change something on the bar up top with this phone, my cell standby becomes a serious battery killer.
Is there any reason for or solution to this problem? Any help would be appreciated.
Sent from my DROID BIONIC using XDA App

are you between 3g 4g wifi i know when i toggle between wifi 4/3g it uses a lot of consumption just scaning for newworks etc.. and you might have power saver enabled so as soon as you turn your "off" it disables data and then you turn it back on it enables it sometimes it more harm than good... sorry i can't help more..

Download juice defender from the market and play with that a little... Auto toggles data when you want it too (screen off, etc.) Makes my battery last at least 50% longer.

I'm not messing with juice defender. I don't like apps that shut off data as a power.saving method.
My problem isn't typical as I've seen other users screenshots showing what is draining their battery and it's never over 30%. I didn't have the issue until I messed with the notification bar. Just curious to exactly what caused the issue and if anything can be done about it. I don't keep wifi, Bluetooth, or GPS on unless I am currently using it.
Sent from my DROID BIONIC using XDA App

Sorry but juice defender doesn't work for me. I use too much data and too frequently to have it being shut off on me. I have professional email accounts that sync every 15 minutes. That's not the cause of the issue as I've been doing that far longer than I've had the issue.
Sent from my DROID BIONIC using XDA App

Are you on .902?
Sent from my AXI0M AOKP using Tapatalk

whodat70003 said:
Are you on .902?
Sent from my AXI0M AOKP using Tapatalk
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Click to collapse
Yes. I'm going to try turning off 4g and see if that helps. That could be the problem because I just got 4g at my house a month ago.
Im more curious to exactly what happens in cell standby that would cause battery drain?
Sent from my DROID BIONIC using XDA App

Cell standby is actually all of the power used by the cell radio, if I am reading this right.

silversonic1 said:
Cell standby is actually all of the power used by the cell radio, if I am reading this right.
Click to expand...
Click to collapse
I believe so to. Im pretty sure its the 4g sucking my battery down. The first several months I had this phone, they didn't have 4g at my house yet.
Sent from my DROID BIONIC using XDA App

smokedkill said:
I'm not messing with juice defender. I don't like apps that shut off data as a power.saving method.
My problem isn't typical as I've seen other users screenshots showing what is draining their battery and it's never over 30%. I didn't have the issue until I messed with the notification bar. Just curious to exactly what caused the issue and if anything can be done about it. I don't keep wifi, Bluetooth, or GPS on unless I am currently using it.
Sent from my DROID BIONIC using XDA App
Click to expand...
Click to collapse
Just so you know Juice Defender has a setting which will turn your data on at an interval set by you and for a time set by you to sync even with screen off.
It's not like it just cuts the data because it feels like it. Juice defender works perfectly for me and has been one of the best apps I have purchased.
But to me it seems to most likely be that your 4g is on ALL the time.
With 1d 11h 6m 45s on battery, I get 9% for Cell standby, hell Facebook almost uses more battery than it (this is also a 3G only area).

i think radio is consuming the power.

priddyma said:
Just so you know Juice Defender has a setting which will turn your data on at an interval set by you and for a time set by you to sync even with screen off.
It's not like it just cuts the data because it feels like it. Juice defender works perfectly for me and has been one of the best apps I have purchased.
But to me it seems to most likely be that your 4g is on ALL the time.
With 1d 11h 6m 45s on battery, I get 9% for Cell standby, hell Facebook almost uses more battery than it (this is also a 3G only area).
Click to expand...
Click to collapse
I do know that, but I can't control when my email comes and need to receive it as soon as possible. For this reason, I can't have data even being shut off in predefined intervals.
I've currently turned off 4g to see if things improve. Unless your streaming videos or downloading larger files, 4g doesn't seem necessary for the majority of things.
Sent from my DROID BIONIC using XDA App

Juice defender also has a whitelist feature so you can pick what apps will always have a data connection. So if your email account syncs every 15 mins then it will continue without interruption.
I've found that the cell standby happens when I'm in a fringe or low coverage area
Sent from my DROID BIONIC using Tapatalk

smokedkill said:
I have a problem with cell standby killing my battery. Its the single highest.used thing that is draining my battery (its over 30% and only other thing in that ballpark is the display) . The only mods I have added to stock is droidjunks power toggles. It seems like every time I change something on the bar up top with this phone, my cell standby becomes a serious battery killer.
Is there any reason for or solution to this problem? Any help would be appreciated.
Click to expand...
Click to collapse
Lately I'm having the same problem. standby accounts for 41% of my battery drain. I'm draining at about 10% / hr with very light usage. Smoke let's stay in touch!

tennvol12345 said:
Juice defender also has a whitelist feature so you can pick what apps will always have a data connection. So if your email account syncs every 15 mins then it will continue without interruption.
I've found that the cell standby happens when I'm in a fringe or low coverage area
Sent from my DROID BIONIC using Tapatalk
Click to expand...
Click to collapse
Your email is already being checked at a set interval (default 15min)... unless you have changed it.

[Q] Does wifi turn off during sleeping mode?

Hi to everyone. I forgat to turn my wifi off during my working hours. In the nd of my shift, i check my battery and it was proximately %5 left and even i didnt use the phone during my shift. it was %50 or something before starting. Does wifi still work even on the sleeping mode?
Thanks guys

no it stays on unless you set up the power saving mode i use custom settings so that wifi etc will turn off at 40% battery

wi-fi is a big battery drainer. Always have it off if you don't need it. Same with gps, data, and auto-sync for various accounts

Try using juice defender. I think the free version always you to enable wifi control (after your phone goes into sleep mode it should turn off the wifi until you wake it up)
Sent from my MB870 using XDA Premium App

juice defender is in itself a battery drainer. don't use those "battery saver" apps. they're all bs. just get in a habit of turning off connections manually when you don't need them.

Are you aware of the setting: wifi settings/advanced/wifi sleep policy and set it to sleep when screen turns off?

Higgsy said:
Are you aware of the setting: wifi settings/advanced/wifi sleep policy and set it to sleep when screen turns off?
Click to expand...
Click to collapse
Thanks I didn't know about that setting, but my question is once wifi turns off mobile data kicks in. Which drains battery more? Wifi or mobile data?
Sent from my GT-N7000 using Tapatalk 2

They both drain battery equally as much. Mobile data shouldn't kick in unless you have it toggled on.
Sent from my GT-N7000 using xda premium

Use Green Power to automatically disable wifi and data when the phone goes into stand by. There are lots of settings like enabling wifi at certain intervals to sync email/whatsapp/other push services.
On GB for me it's the difference between losing 25% battery overnight without it and losing only 3% when it's enabled and that's with sync every hour.
It seems that on any ICS rom wifi doesn't use any juice even when enabled in standby. Because of the kernel bug in the leaks I'm now on the official CM9 rom and after almost 9 hours with wifi turned on I only lost 4%, on every other ICS rom I tried I get the same results.

wifi
zen0s said:
Thanks I didn't know about that setting, but my question is once wifi turns off mobile data kicks in. Which drains battery more? Wifi or mobile data?
Sent from my GT-N7000 using Tapatalk 2
Click to expand...
Click to collapse
install battery saver or juice defender , i recommend the second one

firasusman said:
install battery saver or juice defender , i recommend the second one
Click to expand...
Click to collapse
I tried juice defender ultimate but connection was on and off and time to time it took ridiculous amount of time to get the connection back :/ also I don't know why with juice defender I noticed sluggish performance phone, after uninstalling everything was much more snappy.
I have wifi on all the time and I only lose about 2-3% over night on stock, I guess it's fine the way it is for me without using all those battery "saver" apps.
Sent from my GT-N7000 using Tapatalk 2

dr. xp55 said:
juice defender is in itself a battery drainer. don't use those "battery saver" apps. they're all bs. just get in a habit of turning off connections manually when you don't need them.
Click to expand...
Click to collapse
I disagree. I definitely get power savings with JD compared to without it. Auto-disabling WiFi saved loads of power for a start, and my overnight drain has gone from 3-5%, to approx 1% with JD running. I'm not saying all batt saver apps are worth using, but JD works for me.
Its a lot easier to have a well-behaved app that DOESN'T use a lot of power itself manage your connection toggling rather than having to remember to do it yourself.

dr. xp55 said:
They both drain battery equally as much. Mobile data shouldn't kick in unless you have it toggled on.
Sent from my GT-N7000 using xda premium
Click to expand...
Click to collapse
Wrong. WiFi uses more power. Its a separate transmitter being driven by the battery, whereas as mobile data will use the existing transmitter (phone) that's already on, but obviously drive it a little harder than if it was all off.

Data battery drain

Hey everyone.
The battery life on my Ace without using data is brilliant. Even using wifi and playing games etc it can last around 2 days.
When data is turned on I can see the battery % counting down when I use Facebook or use the web browser.
This has happened on a number of ROMs I've tried, even stock based ROMs. I tend to use either on demand or smartass cpu settings.
I'm currently using Democracy 3.2 and it's having the same problems.
Has anyone else experienced this or found a way to fix it?
Sent from my GT-S5830 using xda app-developers app

Some apps that have internet permissions connect every now and then. With data on, battery will drain:
-when transferring data
-when switching edge, 3g and h
-when establishing data connection if it is ever lost.
If you got lots of apps transferring data, it can be solved by installing a firewall on a rooted phone (like droidwall).
The other thing is bad network coverage, which cannot be solved (switching too often or reestablishing data connection frecuently).
Edit: either way, data is a major battery hog when actively browsing (facebook, talpatalk, browser)

If using wifi isn't an option, some users report better battery life using 2g only

I don't think 2G would be an option for me... I've tried it before and the load speeds are far too slow for a lot of my apps to be usable.
I have noticed that the battery drains a lot when trying to establish H/2G/3G connection. I usually just turn data on only when I need it. Do you think it would be better for the battery to leave data on all day so it doesn't have to reconnect when I ask it to 10 times a day?
It seems to be the Facebook app that drains it most. Email / XDA / Dolphin doesn't impact battery quite as much.
Sent from my GT-S5830 using xda app-developers app

Constantly switching data on/off drains more battery than leaving it on all day cuz it will only use battery when transferring data, and if you're on wifi, wifi has preference.
The switching and establishing of data connection drains more battery than the screen at max brightness.

dxppxd said:
The switching and establishing of data connection drains more battery than the screen at max brightness.
Click to expand...
Click to collapse
Wow... That sucks... Is that just for Ace's? My girlfriends HTC Sensation doesn't seem to be affected by switching data on/off a few dozen times a day.
I'll give it a try today. Data is on all day and I'll see if I can squeeze a bit more juice out of it. I've also installed droidwall so that everything gets wifi access but only the stuff I use gets data access.
Thanks for your suggestions, I'll let you know how it goes :victory:

I've given it a try.
Previously I'd turn data on/off when I needed it and it would use 5-10% battery establishing connection and transferring data.
With data on all day I lost 5% in the morning establishing connection but after the transferring data throughout the day impacted the battery far less. I think it really helped that I had droidwall so there wasn't anything downloading in the background that I didn't want to. I got home at night and still had around 70% battery left.
Thanks for your help and advice guys :victory:

I'm shocked, without 3G I still only manage 1 day not 2days count yourself lucky!

I have same problem
Wifi uses less battery then data
Sent from my GT-S5830 using xda premium

nevis said:
I'm shocked, without 3G I still only manage 1 day not 2days count yourself lucky!
Click to expand...
Click to collapse
Turning data on/off a few times again I'd get about a day if I was lucky.
My phone has been on for a little over 24 hours with data on and it's on 80% right now... I've only really used 3G a couple of times but I'm not a particularly heavy user. It spends a lot of it's time locked and a asleep.

[Tutorial] Battery saving techniques

So yes this Phone's battery unfortuanatly is not well at all.. but here is how i managed mine to last a day without charging. Let me also say im a heavy user also. I text A LOT and always pull out my phone in class play a few games to pass the time or just browse my phone. So this does work for heavy / light users.
Go to Wifi/ menu / advanced and click never on Keep wifi on during sleep.
Go to settings/ Location access - Switch to off
For your brightness it will be on Auto switch that off and put it almost to the lowest as you dont really need it high just kills the battery.
- Go to the App store and download Easy Battery savor. When you access the app choose intiligent mode. It really helps !
-Dont ever use live wallpaper it just drains it so fast.
- DOwnload Faux App It really helps (Faux kernel Enhancement Project) Once downloaded go to CPU and set max clock to 1.35 instead of 1.5. it will still be buttery smooth and it will drain the battery less.
Also I am using the Franco Kernel - nightly #53 which in my opinion really helps !
- Try to turn off the WiFi usage as much as possible and you will see a huge difference.
That's all from me guys. By doing all this my battery significantly improved and lasts about a day now.
Anyways if you have better solutionson how you manage your battery and how you extend its life.
- post pictures
- post the apps you use
- post everything !
Thank you !

I use harsh. Whenever I don't game, I lower the max freq to just 810mhz, ondemand, row, mpdecision on (as harsh recommended) and it's still buttery smooth, and of course battery life is incredible, and I also do check the Disable HW Overlays and Force GPU in 2d rendering. And since no kernel controlling apps are needed, my phone feels cleaner too I can't upload battery stats yet as I'm in an area with only edge connectiom and I hate using slow internet connections
Sent from my Nexus 4 using xda premium

Hi.
I think that autobrigthness it's very hard in all phones. It would be an app Download the brightness.
Bye.

In my testing having wifi connected(like ay home and not going saves more battery, this been texted in several android devices including gs3,note 2 and iOS like 4S and iPads, just giving some info
Sent from my Nexus 4 using Tapatalk 2

Why dont you buy an old nokia since you almost get rid of all the cool stuff this phone offers? Brightness to lowest level...that cracked me up lol
Sent from my Nexus 4 using xda premium

A couple of things I noticed with this. The first thing I notice is, in two of your screenshots, you appear to have mobile data disabled completely. The second thing I noticed is that your final screenshot shows 24hr 52 min on battery, yet according to your clock, a it should really be a total of 33hr 6 min since unplugged. Your first screenshot shows 88% battery remaining with it already having been unplugged for 7hr 35 min. With that screenshot showing a time of 3:11pm, that would mean your phone was unplugged at 7:36am. If the phone was unplugged at 7:36am, then how is it only showing a total of 24hr 52min at 4:42pm the next day? It should be showing 33hr 6min. That's an odd inconsistency there. All in all, even with the data that is showed in your screenshot, it shows very little use as phone idle and cell standby are both in your top 5. Your screen was your highest drain, yet there isn't anything else there accompanying it. I could be wrong, but it seems to me that all you did was keep the data turned off on your phone, and connect to wifi where available. You turned your screen on, but didn't really do anything with the phone besides having the screen just on. That said, even stock with no changes, a person can get 24 hours on a charge if they're disabling their phone and not using it.

Interesting tips however I have a few points:
Your first tip suggests having WiFi to Never stay connected during sleep. I am part of another Android forum which deals with tablets. We tested this feature as with a tablet, you are likely to leave it for hours on end before using it again. It was excellent if the tablet was not touched, however we noticed that it significantly increased the battery drain if you were regularly switching between sleep and using it.
Agree with the second but don't throw away practicality, use Location settings when they need to be use, not just turn them off and don't use them.
Leave it on auto-brightness dude, why ruin the nice visuals of a fantastic screen by having it so dark you can't see it? I only ever use lowest brightness when its dark or the battery is nearly dead.
No idea about the battery saver.
I definitely disagree with this. If you use 3G permanently, like I do, then turning on WiFi definitely reduces battery drain. I don't turn off data ever, so switching WiFi where possible is quite a useful battery saving technique.

skezza said:
Interesting tips however I have a few points:
Your first tip suggests having WiFi to Never stay connected during sleep. I am part of another Android forum which deals with tablets. We tested this feature as with a tablet, you are likely to leave it for hours on end before using it again. It was excellent if the tablet was not touched, however we noticed that it significantly increased the battery drain if you were regularly switching between sleep and using it.
Agree with the second but don't throw away practicality, use Location settings when they need to be use, not just turn them off and don't use them.
Leave it on auto-brightness dude, why ruin the nice visuals of a fantastic screen by having it so dark you can't see it? I only ever use lowest brightness when its dark or the battery is nearly dead.
No idea about the battery saver.
I definitely disagree with this. If you use 3G permanently, like I do, then turning on WiFi definitely reduces battery drain. I don't turn off data ever, so switching WiFi where possible is quite a useful battery saving technique.
Click to expand...
Click to collapse
His solution is to turn off connectivity and functionality on the phone. That defeats the purpose of even having the phone at all.

That said, I think a safe UC of maybe 200MHz can have a difference, but to me, it's all about enjoying the phone and the phone experience. No need to screw with it

Don't do the wifi feature. It will use more battery because it will constantly have to reconnect to the wifi connection every time your phone comes out of sleep mode and that will consume more battery.
Sent from my SGH-T999 using xda app-developers app

Crisisx1 said:
Don't do the wifi feature. It will use more battery because it will constantly have to reconnect to the wifi connection every time your phone comes out of sleep mode and that will consume more battery.
Sent from my SGH-T999 using xda app-developers app
Click to expand...
Click to collapse
Crisis, I pointed that out above...

Someone tell me how I can go all day AND listen to 8 hours of Bluetooth audio and I will be impressed.
Sent from my Nexus 4 using xda app-developers app

ronnyg12 said:
So yes this phone battery unfortunately is not well at all.
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Just curious, why did you buy it then? Personally, I'm leaving everything on because I bought the phone for the looks and usability.
And yes, the phone lasts me all day while using it for everything including emails, conference calls, web browsing etc.

I've set up profiles using the Smart Profiles app to quickly turn things on and off at will - hit CAR and bluetooth/GPS turn on, Wifi turns off. Hit HOME and the reverse happens, etc.
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chrisrozon said:
I've set up profiles using the Smart Profiles app to quickly turn things on and off at will - hit CAR and bluetooth/GPS turn on, Wifi turns off. Hit HOME and the reverse happens, etc.
Sent from my Nexus 4 using xda app-developers app
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Same thing here..but I use scripts When I'm in school and all I need my phone for is some tethering and music, I activate my script that sets the max freq to just 810mhz and I undervolt an extra -50mv from the stock undervoltages of harsh, but when I'm out and away, I enjoy the full 1.5ghz quadcore beast trapped inside my pocket
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Don't get me wrong, it's useful to have a decent battery life, but I really don't see the need to turn the device into an expensive brick. My suggestions, which may or may not be better than the ones in the OP, but they seem to work for me on every Android I've come across without screwing with undervolting etc:
1. Turn Auto-Sync off, or increase the duration between each sync. On my old phone, the phone would use Auto-Sync every hour or so which totally killed the battery over the course of day. I turned it off and would sync it manually (taking all of 15 seconds) on a Friday. Made a huge difference, although simply increasing the time between syncs is just as effective if not more so as you still save a bit of time (might opt for that myself :good
2. Use Inverted Apps on SAMOLED, Don't use Inverted Apps on IPS, white colour uses more battery on SAMOLED, but a lot less on IPS :fingers-crossed:
3. Get yourself a Toggle-based Notification bar, you will remember to switch off your WiFi when walking around in public. To that end, switch your WiFi off unless you are connected to a hotspot, the constant scanning will drain your battery and depending on the interval may take quite a large hit over the course of a day. If you rely on WiFi then maybe increase the scan interval time.
4. Turn off all mobile networking services when in a known signal blackspot. e.g. When work pays for us to go to a hotel on the Welsh border in Cheshire, there is absolutely no signal guaranteed unless you go to the end of the driveway, so I turn off all phone services unless I am there. Your phone will drink your battery very quickly otherwise, guaranteed. The easy solution is to use WhatsApp, switch your phone onto Airplane mode then turn on WiFi and connect to a hotspot (if they have one available, hotels usually do). This is surprisingly low on battery consumption.

So basically, just leave my phone in my pocket and not use it. Okay. Gotcha.
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chancy319 said:
So basically, just leave my phone in my pocket and not use it. Okay. Gotcha.
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My battery life is amazing. I guess it just depends on what you compare it to. I had an evo 3d before, and my 3d would be dead by noon without even turning on the screen. My work blackberry lasts 5 days with fairly heavy email usage.
My N4 though, I use it fairly often for browsing, occasional calls throughout the day, streaming audio, this and that. After 12 hours of use I am still at 60% usually. From 7am to 5:30 (typically when i get out of work) I will be at 70%+
Not sure why people are so bent out of shape about it...
On my 3d if I ran facebook app or any stupid **** like that it would kill my battery like i didnt even have one.

Here's another idea get a job or pay attention in school. That will save battery life as well. I have literally seen people stare at a screen without doing anything with the phone, just because they are so obsessed with it being in their hand
Oh and my Sig does not represent the nexus in the mail
Sent from my HTC HD2 using Tapatalk 2

What about those external battery things? Does anyone know where I can find some decent ones online?