yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] JJEgan:
http://xdaforums.com/showpost.php?p=15795337&postcount=4053

Worth reading even if you have a good battery life like me .

- 5% overnight and dropped a further 8 % today .

jje
[Galaxy S II General] zuchitnix:
Dude go for kg2 and you battery will last for 2 days on normal usage.
[Galaxy S II General] JuniorGG:
What's kg2????

That's because during nighttime the phone is 99% of the time in low-power consumption, stand-by mode. In such conditions, the OS automatically sets CPU clock to 200MHz. What SetCPU (and all other clock tweaking apps) does, is to LIMIT the maximum clock frequency the CPU can reach. But obviously when the CPU is already running below this limit, it has no effect.

In other words, you can see the beneficial effects of SetCPU only when you are stressing the CPU (for instance, playing 3D games), whereas you won't notice any improvement when the phone is in stand-by mode!
[Galaxy S II General] 0355:
This' my battery life on Cognition S2 1.15 is about 3 days and 4 hours.

Normal usage, some calls, many texts, a little turn-by-turn navigation with Sygic 3D, some surfing over WiFi, some camera shooting.
[Galaxy S II General] da.trute:
To get that much I can only assume you have some battery management in place, setCPU and the like, what have you got?
[Galaxy S II General] poch_1421:
i'm using neophyte's mirage kernel, stock rom, 200-500 mhz conservative setting, and lowered all possible settings (auto-sync, wi-fi, bluetooth, gps, 10% brightness only, etc)

i use most of my device for surfing, texts, and reading ebooks.

my batt life is around 36 hours :)
[Galaxy S II General] kld_555:
Hi thkc,

Can you please update us with the information after your second charge? does it really work? I have the same issue with my phone (only 10~12hrs of work!) mostly eaten up by 'display' (70%!) when I check the battery graph. I am really eager to solve this issue, keep us posted.

Another question if that really works...my question is..why!? what was draining the battery so much that needed hard reset!?

Note: I don't have any social apps running! Currently I have GPS off, Wifi rarely on, 3G network, occasional games, email synch eveyy 15min.
[Galaxy S II General] x.cr3w:
yesterday i had fw ke2. with this fw under normale usage of phone (bt, wlan on, gsm (not 3g) auto brightness and some widgets on desktop, was my batt life average 10 hours :(.

Today i updated my fw to kg2 and my phone runns now 10 hours and have now 48% of battery :D woooow, fw update helps? ^^
[Galaxy S II General] eclipse245:
I must say this:

1. Condition your battery. Let it die completely, then charge it to full, let it die completely, charge it to full....etc. Atleast 3 times.

2. setCPU, just got this app, and it must've increased battery life like 40% if setup properly.

3. JuiceDefender = doesn't do much at all.

That's about it man. setCPU does work wonders.

OH YES!!!!

2.3.4 Upgrade Also gave a really huge improvement in battery life I feel.

I got 2 days out of just texting and phone calls with like 30 minutes of data usage and 2 hours of WiFi usage.

I'll get like 18 hours if I stream music or video from the internet for like 5 hours + calling + text.

I'm really pleased with my battery life :)
[Galaxy S II General] sohanlon07:
I'm running Lite'ning ROM 4.2 with nimp. Battery life is ****e in general. Got about ten hours of moderate use today. I'm pretty sure juice defender made things worse.
[Galaxy S II General] dzontra11:
Please..guys....check Dhd forum and try to find "Battery problem or life" ...

If you folow that steps ..battey life i's avesome.

For me ...2 days...
[Galaxy S II General] sohanlon07:
Have you a link to the thread?
[Galaxy S II General] dzontra11:
Uhhh nope .....
[Galaxy S II General] dzontra11:
..try this on Google...Dhd battery calibration.
[Galaxy S II General] Rovah:
At this very moment I've been on battery for 10 hours. The phone has been waking up every 15-30 minutes to fetch e-mail, facebook, news and reddit. There's been about 1h worth of calls and some light googling. Battery is standing at 71%.

Im running the latest VillainR.
[Galaxy S II General] kolachaitu:
Am going to repost from Google Code for android.
[Galaxy S II General] Hunteres:
1. hm nice i have heared many times that is better charge the battery before the phone because it may "destroy" the battery (stats)

2. not needed at all for normal user.

3.juice defender is the most eficient battery helper for android! its recomended by developers! and it can perform extremly well if set propertly!

remember this mate.

hint: try cognition ROM with juice defender and u will get about 2 days moderate use and 1 full 24h day with heavy usage! i mean heavy by 2 hours browsing/streaming - 1 hour gaming - 2hours watching movies - 1 hour of phone calls and about 3 hours of music or radio - togheter with bluetooth on + gps on
[Galaxy S II General] ThaiM:
Are you guys sure that letting the battery go to 0% is a real good idea? These batteries are lipos right? In the RC world, which also uses lipos, it's a HUGE no no to let them go to 0%. So how is it okay for these phone batteries?
[Galaxy S II General] King Shady:
Currently running Leo's Revolution 2.4 and am getting excellent battery life. I maunually deleted all the Samsung bloatware which seemed to suck up juice. Overnight (10 hours unplugged) my phone remains at 100% - something my iPhone 4 couldn't even do. Extremely pleased with the lightning fast processor and battery life!!
[Galaxy S II General] vinella:
wow i can't get close to that (also rev 2.4) - must do more reading
[Galaxy S II General] King Shady:
I make sure to turn off GPS at all times unless I'm using Maps, and I had Wifi off when I tested the overnight battery. I have a very strong signal at my house, so that wasn't a problem. Also my brightness is NOT set at auto, but at about 30%. I have auto-sync off and background data on - I have 5 accounts that use data. Hope this helps somewhat.
[Galaxy S II General] -jop-:
I'm running VillainR, and on my first day, I was down to 73% after 45 mins on battery.

What's your secret? I'm still trying to figure out what to do...
[Galaxy S II General] dzontra11:
I am on stock rom(rooted) and till now 25 h..still 34%.
[Galaxy S II General] EarlZ:
Ive had my phone replaced/exchanged for 3 times already and none of them really had bad battery life. This who have bad battery life are either expecting too much or have a faulty device and it should be replaced. This issue is extremely minimal.
[Galaxy S II General] ThaiM:
Used AutoGuard for 30 mins this morning and drained 30% of my battery. Holy jeebers.
[Galaxy S II General] wisey38:
I am using cognition 1.42 which is uv and the screen brightness set to auto and my battery life is great. I had my display on for 5 hours and 30 mins last cycle plus i listened to alot of music. Its probably the best Rom I've used for battery life.
[Galaxy S II General] np231:
I'm on stock Bell SGSII without root, I get about 1%drain/hr in standby and with moderate use I get about 2days of battery life. Haven't found a reason to root the phone yet, and since the battery life is very good I don't wanna mess it up by rooting and flashing different roms.
[Galaxy S II General] groaner:
I am stock as well except I am using a launcher. Are you using any launcher or stock that as well?

I am trying adw now but used launcher pro and am experiencing some high battery usage.

I just remembered i had latitude on so that was probably helping the drain though when i look at my usage i see display is the largest drain.

other than the stock battery analyst app, is there a better one that will detail the battery usage?
[Galaxy S II General] ithehappy:
You don't know about Better Battery Stats yet?

http://xdaforums.com/showthread.php?t=1179809

Regards.
[Galaxy S II General] groaner:
I did not, thank you , installing now!
[Galaxy S II General] fabioascoelho:
I'm using the STOCK KG7 ROM and I've frozen all samsung apps and all bloatware apps that comes with this ROM and calibrated the battery. I disabled Fast Dormancy too.

My battery usually are drained after 22h of medium usage. Some games, social networks, browsing, etc.

I would like to share my 3G connection with my laptop but i think i won't have enough battery to do it, unless i use the cable to recharge my battery while sharing my connection.
[Galaxy S II General] BryanNL:
Your right! I just downloaded BetterBatteryStats and it says 4h24m screen-on time.

Thanks for making things clear!
[Galaxy S II General] ThaiM:
How do we use BetterBatteryStats?

Here's my screenshot. I have no idea what any of that means.
[Galaxy S II General] King Shady:
Delete advanced task killer....... and Samsung has their own task manager that works very well
[Galaxy S II General] Declan79:
King shady,

Interesting with your advice to deleted atk and using samsung version only. Related with this im curious why there is lot of different apps killed between both killer. In samsung only 2-5 then atk reached 20 app killed?

sent from my 2.3.3|dxjpe DJGTabs7
[Galaxy S II General] ithehappy:
Well it is advised not use ATK in GB 2.3.3 and post. There are thousand threads stating the reason. Like this one,

http://geekfor.me/faq/you-shouldnt-be-using-a-task-killer-with-android/

You are seeing the running processes. The best part of BBS is Wakelock stats, for that see 'Partial Wakelocks' from the dropdown menu and you will be able to see the apps/processes causing the wakelocks in deep sleep.

Regards.
[Galaxy S II General] Declan79:
I'm reading it now but still wonder how come theres a huge different between them:) also why theres a lot of kill apps

sent from my 2.3.3|dxjpe DJGTabs7
[Galaxy S II General] Declan79:
Just moving both taskiller from my galaxys:) thanks fyi

sent from my 2.3.3|dxjpe DJGTabs7
[Galaxy S II General] yklai18:
normal usage for online and music, get me through 8 hours. passive use more than 2 days
[Galaxy S II General] groaner:
I wish.

Testing it today after moving to a new launcher (trying adw) and minimal widgets, and I would say low level usage I am currently at 41% after unpluging 9hours ago.

there is no way I will get past 24 hours.

Not rooted. Stock everything.
[Galaxy S II General] iwang:
I get 6 hours, using it as a smartphone with about 2 hours screen on time. Tried to freeze everything but doesn't make much difference. The phone shall be shipped with 2200mah battery.
[Galaxy S II General] BryanNL:
I deleted ALL task killers from my phone except for the built-in stock ome ofcourse! I get about a whole.day of average use now opposed to 9hrs, earlier. Now I don't have to recharge in the middle of the day!
[Galaxy S II General] ChongoDroid:
The latest nightly with the latest radio seems rock solid. I had ok battery before but this is leaps and bounds better. 13 hours uptime 2 hours and change screen on time. Oh and I'm still at 40% battery :)

Sent from my Samsung Seine
[Galaxy S II General] m2smoe:
With a little tweaking you can get very decent battery life:

Technically, this should give me 8-9 hours with screen on :)
[Galaxy S II General] rikz112:
what kinda tweaks?? im using the new kh3 firmware and have used titanium to freeze apps and some bloatware
[Galaxy S II General] m2smoe:
I use KG6 firmware, haven't tried KH3 yet, waiting for Revolution 2.6.

My tweaks are mostly using setCPU to undervolt (no OC), it seems to be extremely effective in keeping battery drain to a minimum. I don't use titanium at all, I don't really have any apps that need freezing, and either way I don't think freezing apps is the way to go to save battery, undervolting properly (meaning plenty of testing to make sure settings are stable) seems to be the way to go. Playing more demanding games makes the battery drain very quickly, however video playback (not streaming) seems to be relatively ok.

I am still testing everything, but I think the most effective way to save on battery drain would be to create specific profiles for specific uses (video playback, gaming, screen off, etc), however, most of those aren't available in setCPU.

These are my current setCPU settings (keep in mind each phone is different and you should still test things out for yourself):

MAIN: Scaling On Demand, 1200 max, 200 min.

Profile: Screen off: Scaling Conservative, 500 max, 200 min.

Voltages:

200Mhz - 875mV

500Mhz - 925mV

800Mhz - 975mV

1000Mhz - 1075mV

1200Mhz - 1250mV (unchanged from stock)

I didn't touch anything above 1200Mhz, as I do not want to overclock the device.
[Galaxy S II General] ThaiM:
Just uninstalled ATK. Hopefully that makes a good difference.
[Galaxy S II General] dzontra11:
What is ATK?

TNX
[Galaxy S II General] ThaiM:
Advanced Task Killer

https://market.android.com/details?id=com.rechild.advancedtaskkiller&feature=search_result
[Galaxy S II General] dzontra11:
Ahhh..yes....sorry.
[Galaxy S II General] Jesmicael:
a day and a half with moderate use! :) depends what your doing aye!!!
[Galaxy S II General] ocaldini:
google maps is killing my battery! how to disable it?
[Galaxy S II General] BryanNL:
Freeze it if you don't need it.
[Galaxy S II General] Pfeffernuss:
Why? You recharged in between so that calculation makes no sense at all. Eight to nine hours screen-on time while doing anything worthwhile is absolutely impossible. I have also managed to squeeze out over nine hours once but didn't do anything with the phone, just left it there with an almost black screen.

Don't make false assumptions. What you claimed to be possible really is not. No idea why people make these claims anyway.
[Galaxy S II General] Maxomix0:
Agree :D
[Galaxy S II General] Maxomix0:
100% --> 24min looking xda Forum

---> 90 % battery
[Galaxy S II General] m2smoe:
Obviously, 8-9h is not with screen off, read the time with screen on on the screenshots.

What I claimed to be possible is obviously right, why would I lie about it and make fake screenshots?

If you only get 9h battery life with the screen off I pity you, you have a bogus phone/battery. Even with the stock ROM most people can easily get 24h battery life with the screen off.
[Galaxy S II General] nico98:
Got the phone Thursday. This is usage after 2nd charge. Only charged a bit in between while I was transferring music yesterday and updating phone.
[Galaxy S II General] iwang:
Jd free takes me to 15 hours of use...it was 8 hours max without it..
[Galaxy S II General] Pfeffernuss:
Eagerly awaiting the screenshot(s) showing 8-9 hours of SCREEN-ON time while using the phone normally and ofcourse without recharching in between. Good luck.
[Galaxy S II General] Tinderbox (UK):
Is your S2 rooted?, is it needed for JD to get the best battery life?
[Galaxy S II General] iwang:
Mine is rooted. Signal was poor in my area..so jd really help.moreover I like to play with setting..battery better now, almost double. Sync every 15minutes.
[Galaxy S II General] Ezzy77:
Task killers only make things worse on Android.
[Galaxy S II General] ThaiM:
Apparently so. Ever since getting rid of ATK, I've noticed a small improvement in battery life. But since 2 days ago, I've gotten a really noticeable increase in battery life after installing Watchdog and blacklisting a bunch of crap. ie. Social Hubs, Wifi Sharing, etc...
[Galaxy S II General] huuub:
go to maps and logout of latitude!!!
[Galaxy S II General] groaner:
Would disabling autosync and setting it to sync every 15 minutes improve battery?

I see where to disable the auto sync but I dont see where to set the sync time to every 15 minutes.

I'm willing to try it!
[Galaxy S II General] Vrasidas:
Got the phone 3 days ago. It takes too long to charge it up (~4 hours) and i feel that it discharges also too quick (down to 10%).

This time I charge it turned off it seems to double up the charge speed.

Is there a problem with the battery? :confused: :confused:
[Galaxy S II General] iwang:
The battery improves with every charges. Mine gets better all the time.

As for syncing, you would need to get rooted and I use

Juice defender ultimate to manage syncing timing. It works.
[Galaxy S II General] Vrasidas:
10% off during the night with wifi, 3g, gps, bluetooth all off..

I stop Latutude and Maps from "Running Processes" (two of each running) but when I go back to the runing app after a while I see them running..

EDIT: ok I forced stoped them from "Manage App" and seem to be off until now..
[Galaxy S II General] 7moooodi:
For me it lasts between 15 to 24 hours depending on the usage.

Wifi used to be the most contributor in battery life consumption for me so I used to avoid using it unless needed, but currently I'm on madmac 1.6 ROM and I noticed a huge improvement, I'm using it currently around 75% of the battery life span and still I'm getting the same battery life I used to get when I was merely using it!

Few months ago when I first bought the phone I got it once up to 75 hours battery life but this was with zero wifi, almost zero 3G and just few minutes of phone calls, mainly I was just using it for gaming (Simple Games) because I was out in the desert without any kind of network to be used :)

Anyway, the phone is great and from what I read here and there it has one of the best battery consumption compared to the other dual cores. If you want a better battery life you can find it in single core phones but none of the dual cores phones can give you a much better life :)
[Galaxy S II General] brunopatterson:
It takes ages to charge as the Sumsung supplied only charges at 700mA as opposed to 1000mA that most other chargers charge at. Grab yourself a 1000mA charger and it will charge quicker.

Battery life does improve a bit after the first few charge/discharge cycles, plus as time goes on you won't be playing with the phone constantly!

I find I lose about 4-5% overnight, I switch wi-fi off. But everything else is left as it is.
[Galaxy S II General] ccrows:
Not entirely true. If that was the case, Samsung wouldn't have included a Task Manager with the phone. (and yes I realize that I said manager)

I do agree to avoid using Advanced Task Killer. That was good up to Eclair. Froyo and beyond it can't find half the apps anyway, and most of the apps that it kills are the ones that pop back up so of course it is not recommended to use.

If you really want a 3rd party to use that makes a difference, install "System panel" from the market. That app monitors how much memory is being used per app, plus it lets you know which apps keep popping back up. Those apps you don't want to kill, unless you really don't need them - uninstall them if that's the case. Or at least freeze them with Titanium Backup, if you temporarily don't need them for a while. BTW "System Panel" is free and highly recommended by many.

Those steps have truly improved my battery life on ALL my Android phones using Froyo or Gingerbread. Hope this helps someone out there... :)
[Galaxy S II General] BryanNL:
I believe "System Tuner Pro" does the same? for all-in-one I'd recommend this app.

-edit; it can freeze apps. Analyze. Kill apps. Check ALL apps including kernel and system apps and excluded apps. SetCPU. And many more.
[Galaxy S II General] ccrows:
Good for somebody else, unfortunately I have a 3rd party app for all of that stuff already... :(
[Galaxy S II General] olyloh6696:
I find battery life alright. Last a day if I don't touch the phone :D

Still not as good as my Desire S though
[Galaxy S I9000 Q&A, Help & Troubleshooting] jeremyswire:
hello all ,

this problem just started last few days (no i havent changed anything on the phone) ive got a i9000 on bell. im using romkitchen v2 . i attached a photo . its doing just as the thread intro says

it only acts up when i when i try to make a call . 1 - 2 min later the 3g/h bars back and i can make out going calls .

any ideas?

thank you
[Galaxy S I9000 Q&A, Help & Troubleshooting] chaoszero112:
Make sure you always have 3G data turned on. Also use a Bell modem that supports 850Hz, JK4 if you're on 2.2.
[Galaxy S I9000 Q&A, Help & Troubleshooting] jeremyswire:
Well aware to have that on its Never been off . .
[Xoom Q&A, Help & Troubleshooting] zehkaiser:
Other than the cool things involving external storage, keyboards, etc, I would like to know if CWM will become like it is on my Droid X. I can do anything on my X without needing a PC. I can flash it completely stock (including kernel, recovery, etc) and install mods and "ROMs". Is this going to be a goal for the Xoom, as well? I'm mostly looking to take the PC out of the picture unless I make a brick.
[HD Mini General] mhajer.sy:
Hello

How are you, I have a HTC HD mini

Of course, I'm in the Middle East in Saudi Arabia

I would not say I regretted that I bought this machine but Despaired of problems

I want you to solve the problems .. Because the company did not solve my problem

The first problem: if the slide in the device I slice prepaid so I can make calls must have a balance of more than 19 SAR

Though less so I have to turn off the machine and then re-run so that I can call again, "with each call"

The second problem: When someone sends me a message it to contact me directly, but left his stronghold to another person sends me a message .. Vts the first and remains suspended to the new third person to send a message ... Etc. Thus

Please note: that the two remained more than two weeks in the security did not solve the problem .. I found someone else had the same problem and also not solved ..

Many of you have a solution?
[Eee Pad Transformer General] shawnbuell:
Asus just posted on their U.S. facebook that they are currently working on getting an OTA update to 3.1!

I am really excited to be able to hook up my 360 controller. Emulations gonna be amazing.
[Eee Pad Transformer General] turbulent28:
wait, whats this about the 360 controller?

im new to android, so im learning as i go
[Eee Pad Transformer General] corwinmortac:
HC 3.1 will enable USB host for the first time and will allow for controllers to be plugged in to the devices. At the Google IO conference they had a 360 controller running their presentation on a Xoom.
[Eee Pad Transformer General] Vadimus_ca:
In 3.1 it is promised to support variety of USB devices, including even Xbox360 wired controller (demonstrated during Google IO 2011).
[Eee Pad Transformer General] zapatathemute:
This is great news! I'm loving the support Asus is giving this tablet!
[Eee Pad Transformer General] donatom3:
http://www.facebook.com/ASUSEee/posts/198383890205017 Since the facebook post wasn't linked.
[Eee Pad Transformer General] benmyers2941:
I've always had great experience with Asus on the pc hardware side of things. I'm glad to see they're keeping up their standards with Android.
[Eee Pad Transformer General] Srikar_NBK:
Just a wild question, but would HC 3.1 support USB Speakers too ? :p
[Eee Pad Transformer General] keroppilee:
lol just had a thought it wont take long to roll the update out since so few people actually have the tablet...
[Eee Pad Transformer General] seshmaru:
Totally because amount of tablets equals development time right? Oh wait....
[Eee Pad Transformer General] bedoig:
I would assume he was talking about not having to do a prolonged, staged rollout once the update is ready. Not development time.
[Eee Pad Transformer General] seshmaru:
prolonged staged rollout is pretty much because of SKU's, not cause of amount of tablets.
[Eee Pad Transformer General] DevCake:
Master Emulator TF compatability thread, apps, roms, controllers. Please contribute.

http://xdaforums.com/showthread.php?t=1074709

~DC
[Eee Pad Transformer General] Dark lord me:
Hmmm hopefully we can use this as a benchmark on how long it will take for us to get updates. Obviously the Xoom got it first because that is the device google builds on but with the lack on skin on the Transformer this really will tell us how they will be.
[Eee Pad Transformer General] jerrykur:
I thought that Asus did some light skinning, a few buttons and added a few apps.

It looks like Samsung did a whole lot more work.
[Eee Pad Transformer General] javroch:
Apps probably aren't hard or light skinning either. Samsung did a whole lot more work, or added a whole lot more bloat?
[Eee Pad Transformer General] vincheesel:
+1