Database Users

Battery life is GREAT, until you use it?!

This is not another thread about battery life obsession. It's more about a curiosity.
I have my Evo tuned so that it has great battery life on standby. When I use it for anything--SMS, data, local apps--the battery drains very fast.
I know that data, CPU, and display are the major consumers, but...
I have a Nexus One, with also a 1Ghz Snapdragon, and almost exactly the same loaded apps. Same screen resolution, both on 2.2. Both have 1500mAh battery. The only difference is the display technology and radio (GSM/EDGE/HSPA vs. CDMA/1xRTT/EVDO).
When used equally, the N1's battery does not drain nearly as fast as the Evo. How come? I know AMOLED is supposed be more power efficient, but by that much? I know CDMA can be less efficient, but again, by that much?
- - -
Duh! Edited from Hummingbird to Snapdragon (got confused-I just picked up an Epic which has Hummingbird). Thanks for correcting.

They both use Snapdragon, Hummingbird is Samsungs CPU codename, it's based on the same architecture but uses a smaller process.
What software are you running?

Same exact problem as OP...this baffles me.
Sent from my PC36100 using XDA App

Systemfraud said:
Same exact problem as OP...this baffles me.
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
Is it something new, or has this always been happening?
Was it after the new update or kernel WHATEVER, that you flashed?

If you’re running the stock kernel, do you think the fact that the screen is physically bigger may have something to do with the difference? I’ve always accounted the difference in the battery drain speed (between screen on and screen off) to the fact that most of us are running tweaked kernels that are overclocked when the screen on (with 5 point multi-touch, etc), and underclocked with the screen off.

The problem with battery life issues is that most of the time it can be just a perception and not scientific evidence at all.
Personally, I had an iPhone 3GS prior to getting an EVO and I would say the same exact thing happened with my iPhone. Especially when I was playing games. It doesn't seem to happen with my EVO.
Even seemingly silly things like the Battery Icon can help with the perception that battery life on the phone is bad. Since it only has 4 levels, it kind of tricks your mind into thinking your battery is draining really fast. Try flashing this.
Scientifically, The difference in battery life running the same exact apps under the same exact conditions would be almost negligible between an Evo and a Nexus one. You could even test them side by side and see for yourself.
Also, some facts:
- CDMA 3G is LESS power hungry than HSDPA when actually using it. Heck, EV-DO even uses less power than CDMA 2G(1xRTT)! Wi-Fi uses even less, so use it whenever you can.
- There's a huge misconception that AMOLED Screens use a lot less battery than regular LCDs, but in fact, that's only when the screen is showing LOTS of black color. During a web browser session with lots of white webpage viewing, AMOLED has no Power consumption advantage over LCD.

Signal is a HUGE contributor. I get about 12 hours out of my battery 3-4 out of 5 bars. I went to the sand dunes and had 5 bars and my phone lasted 28 hours.

zeuzinn said:
Also, some facts:
- CDMA 3G is LESS power hungry than HSDPA when actually using it. Heck, EV-DO even uses less power than CDMA 2G(1xRTT)! Wi-Fi uses even less, so use it whenever you can.
Click to expand...
Click to collapse
there are some variables here - my router at home sucks, so I actually get better signal (and battery) with 3g and not wifi unless I'm in the same room as the router. Like the guy above me said, signal plays a huge part in it.
btw, were you really one of the few people that had an n-gage?

fachadick said:
btw, were you really one of the few people that had an n-gage?
Click to expand...
Click to collapse
hahaha yeah. Still have it shoved in my closet, actually. I LOVED it.

zeuzinn said:
hahaha yeah. Still have it shoved in my closet, actually. I LOVED it.
Click to expand...
Click to collapse
Man that's a lot of phones...

Plancy said:
Is it something new, or has this always been happening?
Was it after the new update or kernel WHATEVER, that you flashed?
Click to expand...
Click to collapse
Seems like it's always been problem for me..
Sent from my PC36100 using XDA App

Plancy said:
What software are you running?
Click to expand...
Click to collapse
When I run Handcent, N1 uses about 20% less battery over ~400 messages. Browsing sees similar results. No exotic apps and I keep close eye of what is running/syncing in the background.
Plancy said:
Is it something new, or has this always been happening?
Was it after the new update or kernel WHATEVER, that you flashed?
Click to expand...
Click to collapse
I too, have seen this from day one, running all stock ROMs.
zeuzinn said:
The problem with battery life issues is that most of the time it can be just a perception and not scientific evidence at all.
Even seemingly silly things like the Battery Icon can help with the perception that battery life on the phone is bad. Since it only has 4 levels, it kind of tricks your mind into thinking your battery is draining really fast.
Scientifically, The difference in battery life running the same exact apps under the same exact conditions would be almost negligible between an Evo and a Nexus one. You could even test them side by side and see for yourself.
Also, some facts:
- CDMA 3G is LESS power hungry than HSDPA when actually using it. Heck, EV-DO even uses less power than CDMA 2G(1xRTT)! Wi-Fi uses even less, so use it whenever you can.
- There's a huge misconception that AMOLED Screens use a lot less battery than regular LCDs, but in fact, that's only when the screen is showing LOTS of black color. During a web browser session with lots of white webpage viewing, AMOLED has no Power consumption advantage over LCD.
Click to expand...
Click to collapse
On both phones, I have a % battery gauge. I use both phones in good coverage area and have observed them over weeks of use. I would use one phone for the day, do the exact same thing, use the other phone the next, and consistently see the N1 having 20-30% more battery at the end of the day. I'm thinking of loading "current widget" to see the drain rate between the two phones.
On the subject of radios: I have seen manufatures list longer battery life for EDGE vs. HSPA and the same for 1x over EVDO. Also I [think] usually see longer standby times for a comparable GSM/UTMS phone over CDMA (e.g., Touch Pro2 on GSM/UMTS vs. Touch Pro2 on CDMA).
When one says that EV is less power hungry than 1x, are we talking about a time-use comparison or efficiency? Example: 1Mb download, 1x takes, say, 1 minute, while EV takes 10 seconds. Yes, for that download, EV took less power. But if one were to have 1x & EV both running for one minute, which takes more power? I ask because I remember seeing EV transmitting at higher power than 1x.

Best bettery saver for rooted nexus s

OK so I have read different way to save battery power on rooted nexus s but don't know what is best. I am currently using setcpu but can not tell a difference. If anyone has another way please share in great detail because I am new to rooted phones.
Sent from my Nexus S using XDA App

Turning off the mobile data connection will make an enormous difference you won't believe it.
Second is use WiFi when available, it will save tons of battery.

Why does there always have to be a funny guy.
Sent from my Nexus S using XDA App

He's not joking. That IS how you do it.
Sent from my Nexus S using XDA App

Man Im sorry dude read that wrong. I thought he said turn phone off LOL......
Sent from my Nexus S using XDA App

Not so sure about the wifi part. I've compared the phone idling on 3G vs. idling on wifi and with wifi there's definitely more power draw. Confirmed it with System Panel, the CPU is pegged at around 10% usage while idling with wifi vs. about 1% when idling on 3G.
This has been consistent with all my other android phones too (Nexus One, Vibrant, MT4G)

B3arfruit said:
OK so I have read different way to save battery power on rooted nexus s but don't know what is best. I am currently using setcpu but can not tell a difference. If anyone has another way please share in great detail because I am new to rooted phones.
Sent from my Nexus S using XDA App
Click to expand...
Click to collapse
can please post what your setcpu settings are? thx dude!

dinan said:
Not so sure about the wifi part. I've compared the phone idling on 3G vs. idling on wifi and with wifi there's definitely more power draw. Confirmed it with System Panel, the CPU is pegged at around 10% usage while idling with wifi vs. about 1% when idling on 3G.
This has been consistent with all my other android phones too (Nexus One, Vibrant, MT4G)
Click to expand...
Click to collapse
You're right, wifi uses more power than 3G, and they both use more power than 2G. When idling I'd definitely want to sit on 2G if anything. When you actually need an internet connection though, wifi and 3G will be more efficient. They'll use more power but will download much faster to make up for it.

Saving power is the same for almost all android devices:
1) turn off mobile network when not in use
2) turn off wifi when not in use
3) turn off gps
4) turn off automatic syns( if you dont use them)
5) brightness set to low
6) turn off live wallpapers
7) use a black wallpaper
8) turn off haptic feedbacks
9) set screen time out to a smaller interval.
all these steps might help you but it kind of takes away the charm of the phone imho.

dinan said:
Not so sure about the wifi part. I've compared the phone idling on 3G vs. idling on wifi and with wifi there's definitely more power draw. Confirmed it with System Panel, the CPU is pegged at around 10% usage while idling with wifi vs. about 1% when idling on 3G.
This has been consistent with all my other android phones too (Nexus One, Vibrant, MT4G)
Click to expand...
Click to collapse
It's definitely the opposite of that, its counter intuitive but WiFi uses significantly less battery life over 3g. I can post some numbers when I get home tonight if anyone's interested. But a good test is leave your phone on WiFi all night, then repeat on 3g and see the enormous difference. Better yet just look at the official Google specs, web browsing time is always higher on WiFi.
I did some real nice graphing of current draw at 2 second sample rate comparing various tasks which is What I'll try to post later..

What's the best rom for battery life?
Sent from my Nexus S using Tapatalk

robstunner said:
What's the best rom for battery life?
Sent from my Nexus S using Tapatalk
Click to expand...
Click to collapse
Bionix 1.2 @ stock speed, not the OC-ed version
it's stable, fast, and battery good
i have my data on all the time sync-ing every 30min
and 1 battery can last me a full day without plugging it in

Wifi automatically sleeps if your phone is idle for so long, therefore saving battery. 3g absolutely kills my battery so I have mobile data disabled when not using it. Works well for me. Also screen brightness on 0% using an app works good.
Sent from my Nexus S using XDA App

deeren said:
Saving power is the same for almost all android devices:
1) turn off mobile network when not in use
2) turn off wifi when not in use
3) turn off gps
4) turn off automatic syns( if you dont use them)
5) brightness set to low
6) turn off live wallpapers
7) use a black wallpaper
8) turn off haptic feedbacks
9) set screen time out to a smaller interval.
all these steps might help you but it kind of takes away the charm of the phone imho.
Click to expand...
Click to collapse
I agree!!!!!!

AllGamer said:
Bionix 1.2 @ stock speed, not the OC-ed version
it's stable, fast, and battery good
i have my data on all the time sync-ing every 30min
and 1 battery can last me a full day without plugging it in
Click to expand...
Click to collapse
Should you use setcpu with this rom? Or is it better without it
Sent from my Nexus S using XDA App

B3arfruit said:
Should you use setcpu with this rom? Or is it better without it
Sent from my Nexus S using XDA App
Click to expand...
Click to collapse
i tried with and without setCPU, and the difference in power saving was marginal
so i removed it.
it probably gave me an extra hour, but there is a bug with setCPU when picking up calls, it gets staticky until the CPU is at 800 Mhz or more
so with all that i mind, i decided to remove it

leerobson99 said:
Wifi automatically sleeps if your phone is idle for so long, therefore saving battery. 3g absolutely kills my battery so I have mobile data disabled when not using it. Works well for me. Also screen brightness on 0% using an app works good.
Sent from my Nexus S using XDA App
Click to expand...
Click to collapse
True, change the WiFi sleep policy to "never" to avoid this and extra battery savings.

I've been getting the best with CM7 so far, but I think all the roms that are about the same as long as you don't overclock them.
Use a black static wallpaper, low brightness, and get the black-themed MMS and Gmail apps from the Themes/Applications forum.
I can get well through my work day. Usually have 2+ hours of display time on and about 16 hours off the charger by the time I plug in at night with still 20-30% left. Depends on my reception in the day as well, which is pretty bad at work, so I think I'd have 30-35% if my reception at work was good.

deeren said:
Saving power is the same for almost all android devices:
1) turn off mobile network when not in use
2) turn off wifi when not in use
3) turn off gps
4) turn off automatic syns( if you dont use them)
5) brightness set to low
6) turn off live wallpapers
7) use a black wallpaper
8) turn off haptic feedbacks
9) set screen time out to a smaller interval.
all these steps might help you but it kind of takes away the charm of the phone imho.
Click to expand...
Click to collapse
Agreed on all points except for GPS. Since it's an on-demand service, leaving it on makes little to no impact on battery life. The phone only utilizes the GPS connection when an app calls for it and saves you the time of having to toggle it every time you need it. Just leave it on.

RogerPodacter said:
It's definitely the opposite of that, its counter intuitive but WiFi uses significantly less battery life over 3g. I can post some numbers when I get home tonight if anyone's interested. But a good test is leave your phone on WiFi all night, then repeat on 3g and see the enormous difference. Better yet just look at the official Google specs, web browsing time is always higher on WiFi.
I did some real nice graphing of current draw at 2 second sample rate comparing various tasks which is What I'll try to post later..
Click to expand...
Click to collapse
An active WiFi connection uses a lot less than an active 3g connection because the connection already exists and the data transfers faster.
An idle 3g connection uses significantly less energy than an idle WiFi connection. If you aren't using or connected to WiFi, turn it off. Set the WiFi sleep mode to sleep when the screen is off.

[GUIDE] How I got almost 3 days of battery life on my Nexus S 4G

First and foremost this guide is based around the Sprint Nexus S 4G. If you do not have the Nexus S 4G, Than this guide will probably not help you. =)
Secondly all credit goes to the wonderful people that work endlessly to make these wonderful Roms and Kernels. Without you guys Android wouldn't be what it is today!
Third: Please make a back up and use this guide at your own risk. I don't want to bare the weight of someone turning their phone into a paperweight by using this guide.
Alright, Now lets get to the fun part.
Case you've already forgotten why you're ready this topic. This is my rough how-to guide on getting easily over 2 days out of a single charge on your phone, Very much possible to push 3 or more days depending on use and other varying factors.
What you're going to need to start:
- Rooted Nexus S 4G with a custom recovery like Clockwork mod.
- Flash the following Rom http://forum.xda-developers.com/showthread.php?t=1417499
- Flash the following Kernel http://forum.xda-developers.com/showthread.php?t=1436313
-Flash the following "KL2" Radio update http://forum.xda-developers.com/showthread.php?t=1077168
After you have flashed all the above and confirmed your phone is running stable with all the default settings. Charge your phone to 100% and reboot back into recovery, and WIPE YOUR BATTERY STATS
Now. Lets begin configuring your rom and kernel!
- Install CPU MASTER FREE from the android market https://market.android.com/details?id=com.antutu.CpuMasterFree&hl=en
Set the following on CPU Master
- CPU Speed 800 MAX and 100MIN
- CPU Governor CONSERVATIVE
- and Scheduler set to CFQ
- Make sure to click apply on boot as well
- Now Install NSTOOLS from the Android market https://market.android.com/details?id=mobi.cyann.nstools&feature=search_result
Set the following on NSTOOLS
- DEEP IDLE: ENABLED
- Backlight Dimmer: ENABLED
- Make sure Backlight Notifications are left disabled. It keeps phone from idling properly.
- Leave all other settings alone and make sure to check set on boot
- Now lastly install Antutu Battery Saver from the Android Market
https://market.android.com/details?id=com.antutu.powersaver&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5hbnR1dHUucG93ZXJzYXZlciJd
Activate Battery Saver and set to level 2 battery save. Easy as that.
Basically your done! =)
If you notice your phone has a slightly worse or little to no improvement on the battery this is due to you deleting your battery stats. As you use your phone it will write new stats and you will begin to notice a difference after a few cycles. Just make sure your battery is charged when you wipe them, Let the phone run almost completely dead. Plug it up, Let it charge back to 100%, Unplug it. Rinse and repeat. Just be sure to unplug it when you notice it's fully charged even if you don't plan on going anywhere. Just let it sit and run on battery so that it calibrates the battery stats while it's idle as well.
Now as you should already know your battery life is going to heavily depend on use and SIGNAL STRENGTH. It seems a lot of people don't realize the more signal you have the longer your battery will last. If you're in an area with very low signal it can kill your phone in a matter of hours.
I have attached a screen shot of my battery life using this above method. Other settings I will mention
- WIFI ENABLED and CONNECTED
- Bluetooth and NFC DISABLED
- Automatic backlight control enabled
- Facebook notifcations, Weather and Contacts are the only things set to SYNC on my phone.
- Usage: Light to moderate. This includes a few texts throughout the day. A few phone calls, and a brief checking of facebook every now and then.
If I'm missing anything I will update this post. That is all for now. Happy modding and may this tutorial work the same wonders for you as it did me.
Also I should state that the phone finally died at around 2Days 17hrs on battery. My goal for 3 straight days was cut short after a few 30 minute phone calls and other work I had to do on the phone.
If you have any questions. Feel free to post, or PM me. I'll be here =)

cwayn1989 said:
First and foremost this guide is based around the Sprint Nexus S 4G. If you do not have the Nexus S 4G, Than this guide will probably not help you. =)
Secondly all credit goes to the wonderful people that work endlessly to make these wonderful Roms and Kernels. Without you guys Android wouldn't be what it is today!
Third: Please make a back up and use this guide at your own risk. I don't want to bare the weight of someone turning their phone into a paperweight by using this guide.
Alright, Now lets get to the fun part.
Case you've already forgotten why you're ready this topic. This is my rough how-to guide on getting easily over 2 days out of a single charge on your phone, Very much possible to push 3 or more days depending on use and other varying factors.
What you're going to need to start:
- Rooted Nexus S 4G with a custom recovery like Clockwork mod.
- Flash the following Rom http://forum.xda-developers.com/showthread.php?t=1417499
- Flash the following Kernel http://forum.xda-developers.com/showthread.php?t=1436313
-Flash the following "KL2" Radio update http://forum.xda-developers.com/showthread.php?t=1077168
After you have flashed all the above and confirmed your phone is running stable with all the default settings. Charge your phone to 100% and reboot back into recovery, and WIPE YOUR BATTERY STATS
Now. Lets begin configuring your rom and kernel!
- Install CPU MASTER FREE from the android market https://market.android.com/details?id=com.antutu.CpuMasterFree&hl=en
Set the following on CPU Master
- CPU Speed 800 MAX and 100MIN
- CPU Governor CONSERVATIVE
- and Scheduler set to CFQ
- Make sure to click apply on boot as well
- Now Install NSTOOLS from the Android market https://market.android.com/details?id=mobi.cyann.nstools&feature=search_result
Set the following on NSTOOLS
- DEEP IDLE: ENABLED
- Backlight Dimmer: ENABLED
- Make sure Backlight Notifications are left disabled. It keeps phone from idling properly.
- Leave all other settings alone and make sure to check set on boot
- Now lastly install Antutu Battery Saver from the Android Market
https://market.android.com/details?...1bGwsMSwxLDEsImNvbS5hbnR1dHUucG93ZXJzYXZlciJd
Activate Battery Saver and set to level 2 battery save. Easy as that.
Basically your done! =)
If you notice your phone has a slightly worse or little to no improvement on the battery this is due to you deleting your battery stats. As you use your phone it will write new stats and you will begin to notice a difference after a few cycles. Just make sure your battery is charged when you wipe them, Let the phone run almost completely dead. Plug it up, Let it charge back to 100%, Unplug it. Rinse and repeat. Just be sure to unplug it when you notice it's fully charged even if you don't plan on going anywhere. Just let it sit and run on battery so that it calibrates the battery stats while it's idle as well.
Now as you should already know your battery life is going to heavily depend on use and SIGNAL STRENGTH. It seems a lot of people don't realize the more signal you have the longer your battery will last. If you're in an area with very low signal it can kill your phone in a matter of hours.
I have attached a screen shot of my battery life using this above method. Other settings I will mention
- WIFI ENABLED and CONNECTED
- Bluetooth and NFC DISABLED
- Automatic backlight control enabled
- Facebook notifcations, Weather and Contacts are the only things set to SYNC on my phone.
- Usage: Light to moderate. This includes a few texts throughout the day. A few phone calls, and a brief checking of facebook every now and then.
If I'm missing anything I will update this post. That is all for now. Happy modding and may this tutorial work the same wonders for you as it did me.
Also I should state that the phone finally died at around 2Days 17hrs on battery. My goal for 3 straight days was cut short after a few 30 minute phone calls and other work I had to do on the phone.
If you have any questions. Feel free to post, or PM me. I'll be here =)
Click to expand...
Click to collapse
I thought it was the More Bars you have the more Data Kills Your Battery... but sprints 3G sucks .. some users only experience a .5kbs to 1.0 Mbs (if your lucky) ... that being said I think that's why your battery lasts longer. But then again I'm on Wifi so my battery has lasted all day ^_^ 15% left. Nfc on , Bluetooth off , screen at 50% brightness and heavy usage. Buuuut in your screen shot below your on 3G ... the 2 days.. was it always on Wifi?
- Google

What is your screen on time?
I don't use any "power-saving" apps, just AOKP Milestone 2 with Steve Garon's 1.14 kernel to run 50hrs with nearly 4hrs of screen time.
100/1100mhz, interactive governor, standard voltage, bln/bld on, wifi used whenever available. It doesn't help that my office is in a poor signal area - battery life would be much better if the signal reception bar stayed green all the time.
Sent from my Nexus S 4G using xda premium

iGoogleNexus said:
I thought it was the More Bars you have the more Data Kills Your Battery... but sprints 3G sucks .. some users only experience a .5kbs to 1.0 Mbs (if your lucky) ... that being said I think that's why your battery lasts longer. But then again I'm on Wifi so my battery has lasted all day ^_^ 15% left. Nfc on , Bluetooth off , screen at 50% brightness and heavy usage. Buuuut in your screen shot below your on 3G ... the 2 days.. was it always on Wifi?
- Google
Click to expand...
Click to collapse
Screen time out is on 30 seconds. and Wifi was connected virutally through the entire time, exception was when I visited a friends house which is why in the screenshot it does not say it's connected, However it was still active.

Braneless said:
What is your screen on time?
I don't use any "power-saving" apps, just AOKP Milestone 2 with Steve Garon's 1.14 kernel to run 50hrs with nearly 4hrs of screen time.
100/1100mhz, interactive governor, standard voltage, bln/bld on, wifi used whenever available. It doesn't help that my office is in a poor signal area - battery life would be much better if the signal reception bar stayed green all the time.
View attachment 912363View attachment 912364View attachment 912365
Sent from my Nexus S 4G using xda premium
Click to expand...
Click to collapse
Those are very nice stats, Question, On your battery log, What are the massive drops in battery from? low signal or just heavy use on your phone?
Also I believe I'm going to go back an retry my experiment with SmartassV2 governor and On Demand. because I recently read they are better than conservative.
By all means play around with these settings and if you report back something I can approve on I will be happy to update this post and give credit to whoever finds more tricks to improving the battery life even more =)

cwayn1989 said:
Those are very nice stats, Question, On your battery log, What are the massive drops in battery from? low signal or just heavy use on your phone?
Also I believe I'm going to go back an retry my experiment with SmartassV2 governor and On Demand. because I recently read they are better than conservative.
By all means play around with these settings and if you report back something I can approve on I will be happy to update this post and give credit to whoever finds more tricks to improving the battery life even more =)
Click to expand...
Click to collapse
They're from heavy use, probably angry birds or web browsing. The poor signal usually results in much slower drain.
Sent from my Nexus S 4G using xda premium

Braneless said:
They're from heavy use, probably angry birds or web browsing. The poor signal usually results in much slower drain.
Sent from my Nexus S 4G using xda premium
Click to expand...
Click to collapse
Not saying you're wrong, but based on past experience when I lived in an area where my phone was constantly losing and gaining signal or especially switching between Verizon (Roaming) and Sprint to find a signal, My phone would get very warm and it would cause massive battery drain.

Also in regards to the Sprints 3G speed.
Here in town where I live now, with the new KL2 radio
Edit:
I have attached screenshots of 3G speeds. It seems today when I ran the test the speeds aren't that special, I guess it all depends on network load.

Braneless said:
What is your screen on time?
Click to expand...
Click to collapse
This ^
I can get about 4-5 hrs on screen-on time a day with a full charge before it dies. I couldn't imagine spreading that amount of time over three days unless I was travelling again or something lol
Sent from my Nexus S 4G using Tapatalk

kyouko said:
This ^
I can get about 4-5 hrs on screen-on time a day with a full charge before it dies. I couldn't imagine spreading that amount of time over three days unless I was travelling again or something lol
Sent from my Nexus S 4G using Tapatalk
Click to expand...
Click to collapse
Haha yeah sorry about that guys, That could have been helpful for me to post, but I actually just now realized you could view your screen on hours by clicking it. I feel about stupid now.
After I tweak some more settings and do this little experiment again I'll be sure to actually include that, Seeing as it would have been helpful LOL

Braneless said:
What is your screen on time?
I don't use any "power-saving" apps, just AOKP Milestone 2 with Steve Garon's 1.14 kernel to run 50hrs with nearly 4hrs of screen time.
100/1100mhz, interactive governor, standard voltage, bln/bld on, wifi used whenever available. It doesn't help that my office is in a poor signal area - battery life would be much better if the signal reception bar stayed green all the time.
View attachment 912363View attachment 912364View attachment 912365
Sent from my Nexus S 4G using xda premium
Click to expand...
Click to collapse
How do you get your phone to idle so well? I can never get the battery stats to flatline like that. Could it be due to me having BLN turned on as the OP said that causes an idle bug?

tycruickshank said:
How do you get your phone to idle so well? I can never get the battery stats to flatline like that. Could it be due to me having BLN turned on as the OP said that causes an idle bug?
Click to expand...
Click to collapse
There's a possibly you're running an app in the background that's preventing your phone from deep idling. Also try the battery saving app I mentioned in the post as well. It works wonders for some, and others don't notice difference. There's a lot of varying factors.
Have you wiped your battery stats and calibrated your battery with the method I mentioned above? Also you can check to see if your phone is deep idling by going into NSTools and clicking Idle stats.
If you see that your idle numbs are higher than your deep idle stats, Than yes, Something is preventing you're phone from doing so, and I would recommend disabling BLN and seeing if that fixes it.
It could be an issue with BLN and it may not be. My entire post is basically the steps and settings I've figured out and tweaked on my own to achieve maximum battery. I've read around and it seems some others have used BLN without any noticeable difference in battery at all. I guess it really just depends.
Also to the other post, The main reason I run my phone unclocked is basically, in use, I prefer the CPU to be at the lowest max speed possible, while remaining smooth, and I've noticed no lag at 800max, So therefor even when I'm using my phone it's still not going to be pulling as much power as if lets say I had it set to 1000 or 1100. Overclocking is great, Don't get me wrong, but unless you're doing something heavy like gaming or a sheet ton of crazy multitasking, I don't really think it's worth it. That's just my opinion though =)

So you're at home all this time? Then why go through all this trouble and handicapping of features and performance? Why not just plug it in?

jesusice said:
So you're at home all this time? Then why go through all this trouble and handicapping of features and performance? Why not just plug it in?
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How exactly am I handicapping? I had people asking me how I was getting my battery life and wanted me to post up details on it, so I decided I would. I run an underclocked phone because like I stated in my previous post, I don't see the point in running a overclocked phone unless you're going for benchmarks or doing a lot of heavy multitasking and then by all means, Take the 5 seconds to change your max CPU speed. If you're referring to me not running BLN, That's because for some, including me it keeps your phone from idling and will cause battery drain. It works fine for some, others it doesn't. I'm SURE it's a problem on my end, but until I get it worked out I'm just leaving it off for now.
I've been learning about rooting and modding since the Sprint HTC Hero days. I'm far from a professional and will be the first to admit I'm an amateur compared to you guys, I cannot develop, I cannot code. I'm simply wrote this guide as a reference point for people wanting to get good battery life, That's why I said tweak with the settings and have fun.
The main reason I'm so ecstatic about the battery life, is up until now I've barely been able to get a days normal use out of an android phone even running custom roms and all that good stuff. Now I can actually use my phone throughout the day, Throw it on my dresser at night, and wake up the next morning with still enough charge to use it again without having to worry about plugging it up every night.

Home or not, this info can prove to be very useful depending on an individual's circumstance. I work multiple jobs and when I get home, sometimes I'm so tired I don't even bother to fiddle with my phone's charging cable and just crash on my bed. I've gotten great battery life using similar tactics (went to bed with a 13% charge once, woke up with the thing still alive and kicking), so again, some may find this extremely helpful. Good work!

zeigan said:
Home or not, this info can prove to be very useful depending on an individual's circumstance. I work multiple jobs and when I get home, sometimes I'm so tired I don't even bother to fiddle with my phone's charging cable and just crash on my bed. I've gotten great battery life using similar tactics (went to bed with a 13% charge once, woke up with the thing still alive and kicking), so again, some may find this extremely helpful. Good work!
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Thank you kind sir. I'm glad you were able to find this poorly formatted guide useful! =D

3G Drain on Jelly Bean

Are we likely to see a fix for this? We know there is a problem with 3G drinking battery but how likely are we to see a fix. Solutions like disable 3G aren't viable for a lot of people, so I just wondered what peoples thoughts on this were.

Try changing your modem. You should see a slight improvement in battery life, nothing major but still better than nothing.
Sent from my GT-I9000 using Tapatalk 2

Yeah a modem did help but I still had a big problem. Are we likely to see a fix, I remember this being a problem with ICS which is why I reverted back.

Its not the modem. My phone stock uses the XXKG3 modem, and i have been using that on ICS and now into JB. Jellybean definitely has worse battery concerning 3G / H for some reason. I just barely squeeze a day out of mine.

Yeah, I was struggling to get even a day. I tried almost all of the Jelly Bean ROMs and they all suffered from the same problem. I really wanted to stick with JB, especially C-ROM because it was like a dream to use but on a good day I'd get about 7 or 8 hours maybe? I would always have to plug it in twice a day. Currently trying SauROM which is better but I'm starting to think that the best for battery life is genuinely a stock rom like JVS.

skezza said:
Yeah, I was struggling to get even a day. I tried almost all of the Jelly Bean ROMs and they all suffered from the same problem. I really wanted to stick with JB, especially C-ROM because it was like a dream to use but on a good day I'd get about 7 or 8 hours maybe? I would always have to plug it in twice a day. Currently trying SauROM which is better but I'm starting to think that the best for battery life is genuinely a stock rom like JVS.
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with any rom I've got a day and 6 hours depends on usage

On Jelly Bean?

did you limited your speed to 3g or do you also use hsdpa? if you use hsdpa, give 3g a try i think the battery drain in 3g is a lot lower ... in my opinion if you are not downloading 3g is fast enough to browse or youtube.
for just instant messaging you can give 2g a try

2G isn't really usable on Three mobile.
I don't know how to limit to just 3G. But yes I normally use HSPDA. That said, we should be able to use it without draining our battery

I'm not getting any major battery drain here. I can last a full day on HSDPA and or WiFi.
Sent from my GT-I9000 using xda premium

Really?

skezza said:
Really?
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Yup
Sent from my GT-I9000 using xda premium

if you will buy a strong battery 1800-1900 mAh, you will see the different

Yeah, that's the alternative. Bigger battery I guess.

skezza said:
2G isn't really usable on Three mobile.
I don't know how to limit to just 3G. But yes I normally use HSPDA. That said, we should be able to use it without draining our battery
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You CAN limit to just 3G. You have to go to Advanced Settings or Galaxy S Settings (depends on a ROM) and go to HSDPA and put it to UMTS mode only. It'll switch it to 3G and will consume less battery
Sent from my GT-I9000

Helloworld294 said:
You CAN limit to just 3G. You have to go to Advanced Settings or Galaxy S Settings (depends on a ROM) and go to HSDPA and put it to UMTS mode only. It'll switch it to 3G and will consume less battery
Sent from my GT-I9000
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in my opinion, thats the point, go to settings/advanced/RADIO in your case hsdpa + hsupa should be ticket, simply tick umts an you should notice, the changing radio icon in the status bar (no longer h, but 3g).
your 3g and hspa power consumption depends really strong from the signal strenght and in your phone is connected constantly or changes often. bad reception causes a large waist of battery power.

My guess is you have Google Now / Maps running in background which always uses your data.

darristan said:
My guess is you have Google Now / Maps running in background which always uses your data.
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On slim 2.9, I found that removing G now, and turning off all location tracking increased battery life. Now I can get a day and about an hour/90mins of screen on time with data/wifi only on when using it. I suppose after more than 2 years of use on the one battery charging every day or more, there's only so much one can expect from a device and battery.

But isn't it recognized that this is a problem? The 3G Bug? Nothing to do with Google Now etc

theskymoves said:
Now I can get a day and about an hour/90mins of screen on time with data/wifi only on when using it. I suppose after more than 2 years of use on the one battery charging every day or more, there's only so much one can expect from a device and battery.
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in my opinion thats not enough, do you mean 24 hours or 16 hours? could be a little more with 90 mins of screen time, but you shouldnt need more.
inverted apps can by the way help too, avoid white and light colours as background

Damn impressive battery life on stock 4.4.4!

Let the topic title and the pictures tell the whole story about how insanely good battery life we can get out of the Tablet Z if everything is correctly adjusted and with a proper set-up!

And this..
Pure amazing results!

I got to agree with you
quite impressive

Yes its nice. But all Sony Devices since Z series are very good. Sony have done a good Job.
Sent from my D5503 using XDA Free mobile app

It's true but when moderate use with stamina. Classic "stress" cycle with gaming, Lte, or some draining apps can eat juice instantly. Few hours and it's dead. Lte is main problem. No simcard = no drain. Before tabZ I had Asus tf300tg and battery was much better (due to lower connection type) . This one is tricky. After all I'm happy that when I put it away it can stay for week. but when it is used, battery goes quickly down.

DooshPastesh said:
It's true but when moderate use with stamina. Classic "stress" cycle with gaming, Lte, or some draining apps can eat juice instantly. Few hours and it's dead. Lte is main problem. No simcard = no drain. Before tabZ I had Asus tf300tg and battery was much better (due to lower connection type) . This one is tricky. After all I'm happy that when I put it away it can stay for week. but when it is used, battery goes quickly down.
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well, lte may be the cause, but usually if signal is strong it's not. Finetuning kernel clocks, and app wakelocks, especially messenger and google ones, will make battery life much more longer.

DooshPastesh said:
It's true but when moderate use with stamina. Classic "stress" cycle with gaming, Lte, or some draining apps can eat juice instantly. Few hours and it's dead. Lte is main problem. No simcard = no drain. Before tabZ I had Asus tf300tg and battery was much better (due to lower connection type) . This one is tricky. After all I'm happy that when I put it away it can stay for week. but when it is used, battery goes quickly down.
Click to expand...
Click to collapse
Then fine tune your kernel parameters so it utilizes more cores and AT a lower clock speed than core core and ramping up to max clock. More efficent hotplugging is the **** for battery savings!
Rootk1t said:
well, lte may be the cause, but usually if signal is strong it's not. Finetuning kernel clocks, and app wakelocks, especially messenger and google ones, will make battery life much more longer.
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Are you using the WIFI Only or LTE / Wifi modell?

Destroyedbeauty said:
Are you using the WIFI Only or LTE / Wifi modell?
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LTE.

Rootk1t said:
LTE.
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As far as I know - the Xperia Tablet Z with LTE / WCDMA / GSM enabled functionality has the same SOC and mobile circuits as the twin brother Xperia Z - use Better Battery Stats-app and see IF you've some nasty MSM_HSIC_HOST wakelocks / issues appearing?

The battery on this tab is amazing, but I have the Z phone and the battery health deteriorated very quickly, so I'm hoping the same doesn't happen here.