Develop Bugs

Another battery life question...

I have a buddy with a droid x that gets RIDICULOUS battery life. What is it that causes such a difference in endurance? I mean most of the other specs basically match up... Is it htc related? Can I get "droid-like" battery life somehow? I'm on fresh 3.3 with netarchy 4.1.9.1 bfs
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jpmaniac87 said:
I have a buddy with a droid x that gets RIDICULOUS battery life. What is it that causes such a difference in endurance? I mean most of the other specs basically match up... Is it htc related? Can I get "droid-like" battery life somehow? I'm on fresh 3.3 with netarchy 4.1.9.1 bfs
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
I havent played much with the DroidX but from what I have read it has a power profile managment on it much like a laptop . I believe that is the part Motorola put in the phone . Profiles like LONGER BATTERY LIFE , or MORE PERFORMANCE . Something Im kinda surprised the EVO wasnt given but I make it thorugh the day on one charge

Are you rooted?
Sent from my PC36100 using XDA App

Please keep in mind the apps you downloaded and the widgets you have set-up on your screens. Some apps require to be run in the background eventhough they are NOT used by you at the time, such as Google Talk, Qik, Fring, pedometer, and anything that needs to be "ON"...thats one of the culprit on battery drain you might want to look into.
Having one widget per homescreen is ideal, in my opinion..and learned that by having multiple widgets in one screen, is another culprit in battery drain due to it requiring to work upfront, for example, Facebook widget needs to be on constantly and updated for as long as that widget is there, regardless if you touched/used it or not.
Now, for the MOST OBVIOUS part...turning off GPS, WiFi, 4G, and bs when you DON'T need them, by following hot sexy COMMON SENSE, you should get AT LEAST 3 hours more on your battery. Pure sexy common sense LOL ;-)

YenahsYenzow said:
Now, for the MOST OBVIOUS part...turning off GPS, WiFi, 4G, and bs when you DON'T need them, by following hot sexy COMMON SENSE, you should get AT LEAST 3 hours more on your battery. Pure sexy common sense LOL ;-)
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Click to collapse
Greetings,
I couldn't agree more with all the things you noted in your reply.
I rooted mine, and deleted many apps I don't use, but insisted on starting up
even if I had already killed them in the manage applications section.
But I was amazed at how short the life was in spite of having done that. I quickly
discovered (as you noted) that keeping 4G on, drains the batt.
In fact, for me anyway, it really drains the batt!
Just thought I'd mention it, because it was really surprising to me just how bad
an affect on the battery 4G was - bummer.
--Chris

Mine usually gets between 36-55 hours on a charge (record is 58 so far) with about 3-5 hours of "use" on the stock battery. I don't use it to play games or watch movies, just phone, internet, email, etc - widgets all over the place. Gmail push is always on as well. In fact, I unplugged it last at 10:50pm on the 28th (34 hours ago) and I'm at 48% still.
The biggest thing I've found is download setCPU and adjust the CPU frequency to 245 MHz when the screen is off. That saves a lot. Other then that I keep it at 998 MHz (max speed) all other times. I am playing around with tasker and turning airplane mode on while I sleep, but that seems to have a minimal effect, saving around 2% over 8 hours. I use tasker to turn GPS off unless I'm using one of my GPS-enabled programs, although that doesn't seem to do much either.
I'm running just a basic sense rom with a stock kernel, nothing special. rooted with clockworkmod and that's all I've done rom/kernel-wise.
If you actually use your phone a lot I'm not sure there's much you can do besides get a bigger battery. If you just use it mostly as a phone and less as a PMP or gaming device you should be able to get some nice results.
EDIT: Oh yea, and don't use a task killer (I don't). From what I've read those can actually cause the phone to consume MORE power as services are being killed and opened constantly. Android is very good about leaving tasks open in the background without them consuming power. Opening and closing them constantly is another story.

I wish I could figure this out too. I've been switching between a ton of kernels and roms and can't seem to find anything with good battery life. My phones been unplugged for about 2 1/2 hours and I'm at 53% battery life. No widgets running and just average usage.
Running virusrom and kings #9 and a lot of other roms and battery life is a joke.
Sent from my PC36100 using XDA App

So far, the best battery combo I've found is fresh 3.2 with it's stock rom and I returned to it last night. Some say 3.3 is as good or better but I can't seem to get those same results...
But my real question is, why is the droid able to get such great life?
Sent from my PC36100 using XDA App

My phone stays basically plugged in while I'm at work I'm running fresh 3.3 and kings#9 I thought they are suppose to get decent life but not mine I even have it underclocked oh well I guess thank god for car chargers and extension cords lol
Sent from my PC36100 using XDA App

What I have found to help most of all is to NOT use the Mail app - it drains the battery like crazy, especially if you are popping several accounts. Instead, use the gmail client and set it up to pop your other accounts, and push them to you. This literally trippled my battery life. And it is way faster than the 15 minute intervals that the mail app gives you. Give it a shot, you will be pleasantly surprised.

Yet another extended battery 2400mah

Anybody using one of these 2400mah batteries on their evo?
http://www.amazon.com/Extended-Cell-Phone-Battery-2400/dp/B0040MNJPC

not bad for the price

I just don't see why people get extended batteries when kernels now days are supporting my battery all day dragging on into the mornings.. i guess every phone reacts differently.

conman123 said:
I just don't see why people get extended batteries when kernels now days are supporting my battery all day dragging on into the mornings.. i guess every phone reacts differently.
Click to expand...
Click to collapse
pm me where the crap are these battery saving kernals cause all i get is **** and can't find the right link any and all help would be appreciative cause seriously thinking about going to the epic.

bfitzpatrickd2d said:
pm me where the crap are these battery saving kernals cause all i get is **** and can't find the right link any and all help would be appreciative cause seriously thinking about going to the epic.
Click to expand...
Click to collapse
I've tried all the hottest kernels and battery saving tricks and still average only 8hrs under real world use
Running Evo Deck 1.2.1, display at 12%, couple widgets, data off (using wifi at home) , sync off, and all of that. Underclocked, undervolted too.
Browsing, xda app, etc results in 20% battery usage per hour. Battery consumption is zero at idle, but drops like a rock if i use the phone at all.
Sent from my PC36100 using XDA App

I'm using Seidio 3500mah and enjoying the 5 days no charging. I use my phone mainly for texting/facebooking.

Braneless said:
I've tried all the hottest kernels and battery saving tricks and still average only 8hrs under real world use
Running Evo Deck 1.2.1, display at 12%, couple widgets, data off (using wifi at home) , sync off, and all of that. Underclocked, undervolted too.
Browsing, xda app, etc results in 20% battery usage per hour. Battery consumption is zero at idle, but drops like a rock if i use the phone at all.
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
I'm evo deck 1.2.1 with sz 2.2.1
Setcpu at 245/1152 sz governor
Chainfire 3d
Battery calibrated
VM heap at 48
SD card cache set to 8192 on my class six
Brightness on auto
I get 20+ hours of heavy use, xda, music, browsing I'm sixteen so my girlfriend is ALWAYS texting me some pandora, youtube tossed in there
Oh and I'm using a live wallpaper (pixel rain) I keep sync on, gmail hourly everything else daily, weather on the half hour, right now my phone is at 17 hours with 38 percent left.
Under lighter usage ( more pocket time, less texting, less sitting around bored on xda and Facebook )
30 hours is pretty common
Sent from my Xoom using XDA Premium App

Zac95....I hate you lol.
Maybe my batteries are shot - their health shows "good " though. I have two OEM 1500 batteries that I swap, but I did buy an HTC 2150mAh, just waiting on my battery cover to arrive before I use it.
Sent from my PC36100 using XDA App

Battery calibration is very important, don't know how I lived without it
Setting the VM heap to 48 allows the dalvik garbage collector to run less, improving battery
Chainfire 3d helps with anything graphical, makes home using lwps smoother, games run better etc, also saves battery by making all animations, graphics processing more efficient
If you use apps2sd bumping the cache makes it faster, and more efficient saving battery
Also updating to the latest radios etc, and making sure your prls and profile is up to date is essential, many aosp users, formerly including my self forget about that stuff
I've spent a huge amount of time expirementing with different setups, I think I've found my phones sweet spot
I have loads of friends with rooted evos, mine has the best battery and is typically fastest (chainfire 3d) makes everything snappier
Maybe with all of this info you can test these apps / settings and find your phones sweet spot. Good luck man
Sent from my Xoom using XDA Premium App

Zac95 said:
Battery calibration is very important, don't know how I lived without it
Setting the VM heap to 48 allows the dalvik garbage collector to run less, improving battery
Chainfire 3d helps with anything graphical, makes home using lwps smoother, games run better etc, also saves battery by making all animations, graphics processing more efficient
If you use apps2sd bumping the cache makes it faster, and more efficient saving battery
Also updating to the latest radios etc, and making sure your prls and profile is up to date is essential, many aosp users, formerly including my self forget about that stuff
Sent from my Xoom using XDA Premium App
Click to expand...
Click to collapse
would love to know what you did exactly and how to do it...need major battery life improvement.
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oski252 said:
would love to know what you did exactly and how to do it...need major battery life improvement.
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Click to collapse
What would you like to know? I'd love to help. You can pm me if you'd like
My setup is also posted a few posts back.
Sent from my Xoom using XDA Premium App

Since I'm stock for now, my battery sucks.
thinking of buying this since its apparently the same size as the original.
http://cgi.ebay.com/HTC-EVO-4G-EXTE...ltDomain_0&hash=item4aad318894#ht_2377wt_1270
what do you guys think? Can't get a 3500 due to my otterbox case

gab2012 said:
Since I'm stock for now, my battery sucks.
thinking of buying this since its apparently the same size as the original.
http://cgi.ebay.com/HTC-EVO-4G-EXTE...ltDomain_0&hash=item4aad318894#ht_2377wt_1270
what do you guys think? Can't get a 3500 due to my otterbox case
Click to expand...
Click to collapse
I wonder how the mfg pulled that off? My HTC 2150mAh battery is twice as thick as the 1500. I'd bet that that eBay battery will not yield the stated 2100mAh.
Sent from my PC36100 using XDA App

I just bought 2 batteries and a wall charger from amazon, and I just switch out batteries, no more charging or being tied down to a seat

Zac95 said:
I'm evo deck 1.2.1 with sz 2.2.1
Setcpu at 245/1152 sz governor
Chainfire 3d
Battery calibrated
VM heap at 48
SD card cache set to 8192 on my class six
Brightness on auto
I get 20+ hours of heavy use, xda, music, browsing I'm sixteen so my girlfriend is ALWAYS texting me some pandora, youtube tossed in there
Oh and I'm using a live wallpaper (pixel rain) I keep sync on, gmail hourly everything else daily, weather on the half hour, right now my phone is at 17 hours with 38 percent left.
Under lighter usage ( more pocket time, less texting, less sitting around bored on xda and Facebook )
30 hours is pretty common
Sent from my Xoom using XDA Premium App
Click to expand...
Click to collapse
I'll agree with Zac here,
evo 3d with CM7 nightly, SavagedZen 2.2.1 CFS. removed all the crap i dont use or think they suck the battery down. live wallpaper etc.
InteractiveX governor, 245-1113mhz
No setCPU.
no juice defender
no taskkiller.
no 4g - no gps - no wifi
blutooth ON
3g always ON.
battery calibrated is a must
display set to manual around 33% brightness. but i change it on the fly (swipe the notif bar).
Now the results are pretty interesting here:
With the stock battery and all the above; if the reception is good, i can go for 2 days with moderate usage. yes i know i night i sleep, so it idles nicely.
If the signal is not so good, it will destroy the battery, and can't really get anything more than 13hours.
My typical use:
unplug at 10am.
use the phone normally.
plug it back in at midnight that night, and i would have between 35% or up to 67% battery left in the phone, depending on the factors mentioned.
Which to me, going all day is all i wanted before i started tweaking. Mission accomplished.
The quality of the reception is a killer, i'll tell you.

I bought a 3500mah battery from the same company, and it is trash.

are there any extended batteries that fit in an otterbox commuter case?

Battery Life

How do I save battery on my EVO?
Sent from my PC36100 using Tapatalk

turn off auto-sync, turn brightness down to about whatever you can deal with, get juice defender (free in market), get droid wall (also free), get custom kernel with undervolting, get better battery

Juice defender never did **** for any of my phones. The things it does to save battery is common sense, disable wifi, bluetooth, etc. And it kept turning off my data service even when I unlocked the screen.

Buy extra batteries and an external charger.
Run battery down, put in new battery.
Sent from my PC36100 using Tapatalk

Indirect said:
Juice defender never did **** for any of my phones. The things it does to save battery is common sense, disable wifi, bluetooth, etc. And it kept turning off my data service even when I unlocked the screen.
Click to expand...
Click to collapse
you're right that juice defender does the basics as you mentioned but alot of people dont know to turn them off

plainjane said:
Buy extra batteries and an external charger.
Run battery down, put in new battery.
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
I should make a solar battery back, being in engineering and all. Make the cell on the battery, and have a clear case, or double wire it through the case...hmm, you just gave me an idea for a project. Thanks.
this idea copy righted be me 2 Sept. 2011 at 12:26am EST. Suck it apple.

teh roxxorz said:
I should make a solar battery back, being in engineering and all. Make the cell on the battery, and have a clear case, or double wire it through the case...hmm, you just gave me an idea for a project. Thanks.
Click to expand...
Click to collapse
That would be sweet! Hurry up & patent it before Apple steals it from you.
Oh, and I expect one in the mail when it's finished
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plainjane said:
That would be sweet! Hurry up & patent it before Apple steals it from you.
Oh, and I expect one in the mail when it's finished
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
My gold star winner gets 2 on the house.

For me, nothing seems to be helping.
I've done everything I could think of or find to try to aid with battery life. I've tried all sorts of different ROMs/kernels, calibrated the battery, went through several cycles before determining anything, underclocked, even got an extended battery...
In most cases, the battery life is very nice when the display is off. Today I lost 2% after an hour (with Wifi on). However, I turn on the display, and even if it's completely idle with the lowest brightness setting, it drains like mad. So I can get a good battery life if I leave it in my pocket and look at it occasionally, but I know that's not what people mean when they say they're getting great battery life.
Something just isn't adding up.

Well the way I saved battery life was the following
CM7 rom
Tiamat kernel sbc
Setcpu for root users
From there I lowered my CPU speed.
Doing this gave me a full day bettery.
Sent from my PC36100 using XDA App

I went and installed a Seidio 3500 mAh battery and get 2 days without a charge (heavy use). A bit bulkier, but worth it for me.

Power from Battery, commands are from Software.
Edit Software commands, the hardware(battery) follows.
Sent from "Mecury" using XDA prem.

[Q] How to super Optimized Tmo Sammy S2 for best battery performace?

So I switched from the iphone with edge to the Tmo S2 with Jugg 5.0 ROM + Go Launcher. I really appreciate the 4g speed. However, the overall experience is not as smooth as the iphone and the battery life sucks big time. I normally have to constantly plug the phone in whenever I can. It works ok when I'm at work but when I'm out all day my battery won't last more than half a day. It's so bad to the extent that I have to turn off my phone and turn on when I need to call or text so I can keep the phone alive the whole day. I tried Juice Defender but it didn't help my battery at all.
Yesterday I spent a few hours on XDA and I came up with these solution to my battery problem:
+DarkSide Digital Warfare v2.7 ROM (couldn't find 2.5.1 version)
+Flash Synergy Kernel over (supposed to give better battery)
+SetCPU app (auto detection)
+Zeam launcher
So far, it seems to be better on the battery. Is there anything else I could add to make my battery last longer? I need the phone to last at least the whole day without charge. I'm constantly on 4g looking up stocks, reading news, email, google voice, grooveip, facebook, turn by turn navigation, music, netflix, youtube ...
Thanks,

Welcome to Android.
From what it appears, you seem to be a heavy user. The most you can get out of a Android device with heavy usage is 3/4 of a day (14-18hrs) tops.
You have 2 choices, either you travel with the power cord not to far away and plug it when you need it or you invest a whooping 10$ and buy another battery.
There are tricks to keeping your battery healthy but lasting all day as a heavy user will be very difficult.

If this is a new phone it takes a week or so for the battery to settle in a hold a charge well. After a week or so you'll notice your battery is lasting longer. Also make sure that nothing is keeping your phone awake 100%. Some apps don't play nice and cause issues. Welcome to Android.
Note: navigation kills battery fast, when your using it try to plug into a car charger or something.
Sent from my SGH-T989 using xda premium

There are a lot of things you can do to improve battery.
1. Juice Defender (which you say you have already tried)
2. Limit the number of widgets you run or run no widgets like I do
3. Turn the screen brightness down all the way
4. Don't use Live Wallpaper, also, try to pick a dark coloured wallpaper since white/light colours seem to use up more battery.
5. Uninstall apps you don't use.
6. Turn off GPS unless you need to use it.
7. Turn off sync completely or only have your gmail sync. I don't need to be notified when I get a facebook message so I don't need it syncing every few minutes or every hour, I can check that manually myself.
8. Turn off animations.
9. Close background apps that are running that you aren't using.
10. Use Task Manager to close open apps when you are done using it. Task Manger is your friend.
11. Enable Power Saver Mode.
etc etc.
Those are the main things that I tend to do. I plug my phone in every night before I go to bed as well so I am not sure how long my battery actually lasts. But typically after 16hrs of use I still have 60% battery when I go to bed.
Currently my phone has been on for 7hrs 15mins and I have 87% battery. So you can do the math. I am not as heavy a user as you seem to be, but hope this helps. Peace.

Check out this video it helps show you how to save battery. Enjoy!

Thanks for the inputs guys. I should have said I was looking for Rom/Mod/Scripts/Apps... that can be flashed onto the rooted phone. I have done all the basic battery saving housekeepings as listed by Chochiwpg.
Chochiwpg said:
1. Juice Defender (which you say you have already tried)
2. Limit the number of widgets you run or run no widgets like I do
3. Turn the screen brightness down all the way
4. Don't use Live Wallpaper, also, try to pick a dark coloured wallpaper since white/light colours seem to use up more battery.
5. Uninstall apps you don't use.
6. Turn off GPS unless you need to use it.
7. Turn off sync completely or only have your gmail sync. I don't need to be notified when I get a facebook message so I don't need it syncing every few minutes or every hour, I can check that manually myself.
8. Turn off animations.
9. Close background apps that are running that you aren't using.
10. Use Task Manager to close open apps when you are done using it. Task Manger is your friend.
11. Enable Power Saver Mode.
Click to expand...
Click to collapse
I'm up 5hr 45mins on battery and my battery is at 41%. Let's see if it will last for today. I will put Juice Defender in tonight to test out the battery tomorrow.

DroidNo0b said:
Thanks for the inputs guys. I should have said I was looking for Rom/Mod/Scripts/Apps... that can be flashed onto the rooted phone. I have done all the basic battery saving housekeepings as listed by Chochiwpg.
I'm up 5hr 45mins on battery and my battery is at 41%. Let's see if it will last for today. I will put Juice Defender in tonight to test out the battery tomorrow.
Click to expand...
Click to collapse
You could run Juggernaut with Faux Kernel and Gideon's battery scripts. Or Telus T989D stock ROM lightly tweaked with same kernel and script. Got good results on those as well. Good luck.

Btw, has anyone had tremendous increase in battery life using the after market extended battery?
Thanks,

Use fox star rom
Sent from my Galaxy SII T-mobile using xda premium

DroidNo0b said:
Btw, has anyone had tremendous increase in battery life using the after market extended battery?
Thanks,
Click to expand...
Click to collapse
If you are talking about extended batteries that don't require a custom enlarged back cover, you will not get the battery increase that you are looking for, not even close. I cannot speak for the heavy duty ones that require an enlarged back as I do not own one

Gideon's scripts are great with Juggs. Underclock it as well like 384-1080 is a great setting. Also let die all the way down and charge all the way up and repeat for a few cycles. And don't stare at your phone every few seconds either lol! Another thing are the notification lighting buttons at the bottom. Drop to 1.5 seconds.
Sent from my SGH-T989 using xda premium

yoft1 said:
If you are talking about extended batteries that don't require a custom enlarged back cover, you will not get the battery increase that you are looking for, not even close. I cannot speak for the heavy duty ones that require an enlarged back as I do not own one
Click to expand...
Click to collapse
I have the extended 3800mah battery. It's insanely fat and makes the phone look hideous. On top of that I really don't feel like the battery lasts all that long at all. It's in my pocket all day at school and by 3:30 I'm at 35%. This thing cost me 65$. Total ripoff. I'd suggest spending 20$ and buying two more regular batteries. See what that does for you all
Sent from my SGH-T989 using XDA

A few things you can do on ANY ROM to improve battery life.
*) Decrease screen timeout to the lowest possible setting.
*) Adjust screen brightness to the lowest level you can tolerate.
*) Decrease the backlight key timeout to the lowest setting ( or off if you have the option )
*) Be sure to only have wifi and gps on if you are using them.
Those will help quite a bit in general however, a ROM like Juggs is meant to really take advantage of the power of your device so its probably wise to move to a different one if max battery is your goal. I love Juggs but had to move on to the AOSP stuff. Also, heed the advice above, allow the ROM a few days to "settle" before making a switch or even a judgement of its performance.

Thanks for the replies guys. So my phone lasted for 9hrs today which is a little bit of improvement. I was streaming netflix for half an hr on the train on the way back home so that may have drained the battery. I have just installed JD, will post back how it goes tomorrow.
So the extended battery is a no go eh. I really don't want to lug around a few extra batteries. I want to carry as little as possible. I normally carry my phone and my ipad but now I tend to not use the ipad much now because the S2 screen is pretty gigantic for a phone.

DroidNo0b said:
Thanks for the inputs guys. I should have said I was looking for Rom/Mod/Scripts/Apps... that can be flashed onto the rooted phone. I have done all the basic battery saving housekeepings as listed by Chochiwpg.
Click to expand...
Click to collapse
I know the point was already made but just to reiterate, you can get 2 Anker extended batteries (same size as regular battery) and a universal charger for like $20. This will leave you with three batteries. One for the charger, one for the pocket, and one for the phone. With this system its pretty easy to always have one full battery ready to go and one charging. The battery is small and can just go in your pocket, or maybe even in your wallet depending on your preferences. It solves the problem completely. I don't think you are going to do much better because if you are a heavy user then your battery is going to be used because your phone isn't going to be sleeping.
Good luck.

tablador said:
I know the point was already made but just to reiterate, you can get 2 Anker extended batteries (same size as regular battery) and a universal charger for like $20. This will leave you with three batteries. One for the charger, one for the pocket, and one for the phone. With this system its pretty easy to always have one full battery ready to go and one charging. The battery is small and can just go in your pocket, or maybe even in your wallet depending on your preferences. It solves the problem completely. I don't think you are going to do much better because if you are a heavy user then your battery is going to be used because your phone isn't going to be sleeping.
Good luck.
Click to expand...
Click to collapse
If you read my post above. I'm against the idea lugging around too many things. It's also a hassle to swap the battery and keep them all charged. I may be a heavy user but it's not like I use the phone all the time. I use the phone heavily early in the morning on the way to work and after 5pm on the way home after work. The commute each way is roughly 45 mins. In between the commutes i make a few calls and texts through GV. I don't think i'm that of a really heavy user.
Anyway, it's noon and I'm at 75% with JD on and setCPU to 384-1084mhz which is pretty promising.

Questions go in the Q&A section

Since you changed kernals, you aren't going to benefit from TDJ's battsaver script you can use with the stock 2.7 kernal.
Go lower on the max frequency. Something below 800 mhz. Setting a negative gloval mV doesn't hurt, and if you can get to -62.5, that's great.
Oh, and when using data, try GSM only...
To be honest, the larger problem with battery life is typically the user. There's no real magic on making the phone last longer other than using it less. If you're going to be power using the hell out of it by using 4g for hours streaming media, your battery is going to be ****.

8Fishes said:
Since you changed kernals, you aren't going to benefit from TDJ's battsaver script you can use with the stock 2.7 kernal.
Go lower on the max frequency. Something below 800 mhz. Setting a negative gloval mV doesn't hurt, and if you can get to -62.5, that's great.
Oh, and when using data, try GSM only...
To be honest, the larger problem with battery life is typically the user. There's no real magic on making the phone last longer other than using it less. If you're going to be power using the hell out of it by using 4g for hours streaming media, your battery is going to be ****.
Click to expand...
Click to collapse
Don't you think it is ironic for me to switch from the iphone to the S2 because I couldn't stand the slow 2g Edge connection then have to lower data speed to GSM (2g) just so I can use the S2 long enough?
I think the S2 is one heck of a device but the OS and Apps are not running very efficiently.
I tried the ICS ROM ARKSIDE.UCLE2:: x[BETA07.1] in the last 2 days with setCPU at 384-1026Mhz. I have had great battery life. I got home at 12 am yesterday with a 2% battery. Today it's been 7 hrs on battery and my battery is at 70%. I don't know if it is the ROM, setCPU or a combination of the two but I'm pretty happy with the phone right now. ICS is awesome too.
I highly recommend that solution to anyone having a short battery life problem with their S2.

It is a little ironic since you did bring up the comparison. What I was attempting to do was to bring the phone more into spec of an iphone to get similar battery life. You're probably going to even get better runtimes due to the battery having a much larger capacity and better screen technology. All that superior hardware packed in the t989 is going to need more juice to run.
It's great you're getting good runtimes now. From my personal experience, once I drop down to the single digit percentages, it starts lasting a lot longer per percent. If you wanted to squeeze all you can from the device, those 2000mah aftermarket cells might add another 15~30 minutes.

cm10 and flashing another kernel

I have cm10 stable on my galaxy s2 sgh-t989 and the battery life has not been good so I wanted to trying flashing another kernel. Can anyone tell me what kernels will work and if anyones had a good experience improving battery life by flashing a different kernel. Any information is appreciated. I haven't been able to find much about the t989 and flashing kernels. Thank you!

What's up with these threads in the wrong places every so often? It's like no one reads the rules now-a-days...
And also, don't just say that your battery life is bad without giving members a time of how long the battery lasts. We don't want to guess how long your battery lasts.

macboy3000 said:
What's up with these threads in the wrong places every so often? It's like no one reads the rules now-a-days...
And also, don't just say that your battery life is bad without giving members a time of how long the battery lasts. We don't want to guess how long your battery lasts.
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sorrry, I guess I should have posted this in Q/A ... but after about 2hours I'm already almost at 50 percent.

And is most of the time on standby or on heavy usage?

macboy3000 said:
And is most of the time on standby or on heavy usage?
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I would say in between ... my biggest question was really about the kernels. I can determine for myself what is good battery life with experimenting with flashing different kernels, among other things. I'm just looking for a bit more information on flashing a kernel, ones I can, ones I can't, etc.

benpottier said:
sorrry, I guess I should have posted this in Q/A ... but after about 2hours I'm already almost at 50 percent.
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Same here. I cannot get my phone past the 5 hour mark if I am using it. If I just leave it next to me alone, it lasts 7. If I have wifi on, however, it lasts 15! My guess is how strong the network is and whether or not you have an exchange account synced affects it. Another thing is, after a full charge your phone running CM10 will refuse to enter deep sleep for some reason, making for some very disappointing battery life. Rebooting it every time you disconnect a charger helps somewhat, but that's hardly practical: with a battery life this bad, that makes rebooting every hour since I keep it plugged in everywhere I can. I am resigned to lugging an external battery everywhere I go and hate every minute of it.
As for another kernel, don't bother. Battery life has sucked for me with every last rom and kernel combo I have tried, including stock. Numbers have been pretty much the same, and there are no wakelocks on it. What another kernel did manage to do is make my phone really hot and really slow, as well as reboot whenever it feels like it. Phone becomes utterly unusable.
Kernel won't help you. You are not solving one problem, you are solving several : radio, deep sleep and demand for data.
Sent from my GT-P5110 using xda premium

kangelov said:
Same here. I cannot get my phone past the 5 hour mark if I am using it. If I just leave it next to me alone, it lasts 7. If I have wifi on, however, it lasts 15! My guess is how strong the network is and whether or not you have an exchange account synced affects it. Another thing is, after a full charge your phone running CM10 will refuse to enter deep sleep for some reason, making for some very disappointing battery life. Rebooting it every time you disconnect a charger helps somewhat, but that's hardly practical: with a battery life this bad, that makes rebooting every hour since I keep it plugged in everywhere I can. I am resigned to lugging an external battery everywhere I go and hate every minute of it.
As for another kernel, don't bother. Battery life has sucked for me with every last rom and kernel combo I have tried, including stock. Numbers have been pretty much the same, and there are no wakelocks on it. What another kernel did manage to do is make my phone really hot and really slow, as well as reboot whenever it feels like it. Phone becomes utterly unusable.
Kernel won't help you. You are not solving one problem, you are solving several : radio, deep sleep and demand for data.
Sent from my GT-P5110 using xda premium
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dang, ok. Thanks for the info. I'll stick with cm10 and its stock kernel, see if I can't tweak anything to get better battery life.

Get an extended battery I found one on eBay that increases battery from 1850mah to 2400mah without that ugly hump add on to the back.
Sent From the T-Mobile Galaxy S2 using XDA-Developers app

Moved to Q&A as this is not Development

benpottier said:
dang, ok. Thanks for the info. I'll stick with cm10 and its stock kernel, see if I can't tweak anything to get better battery life.
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By the way, I was referring to the current crop of custom kernels for CM10. I wrote it as a general statement and I didn't mean it to be.
There used to be one kernel called KKO. If it gets ported to CM10, get it. Your battery life will still suck, but you will have a slightly snappier phone and more governors to play with. You can squeeze maybe an extra half-hour from the phone this way. Insignificant, I know. Also, the extended batteries are all sacrificing something: either NFC functionality, or the slimness of your phone (some require a custom back cover), or both. In the end, when you do the math, it adds about 2 hours of runtime to your phone: you are still running from charger to charger. The external battery gives me an additional ~7 hours of heavy use, but is a big phone-sized object tethered to my phone with a USB cable. I look like a suicide bomber with a wire running between my pockets. Not ideal, not by a long shot.