yashsingh1/xdaforums huggingface dataset:
[T-Mobile Samsung Galaxy S II SGH-T989] hobbescs:
My battery life was just average at best when I first got the phone. Since rooting and deleting almost all of the bloatware that came installed from t-mobile my battery has been excellent. Right now i'm at 7 1/2 hrs usage with 72% left. This included over an hour of playing music via bluetooth and 30+ min of a continuous download with a fair amount of web surfing. I'm still using the regular rom minus the bloat.
[T-Mobile Samsung Galaxy S II SGH-T989] Enzopreme:
Also, does anyone know of any other samsung phones that have compatible batteries for the Hercules? Im sure the mAh won't be the same but it would be nice to grab an extra battery, and radioshack has a lot of batteries for samsung phones, including the gs II, but not the hercules variant.
[T-Mobile Samsung Galaxy S II SGH-T989] OrrinS1189:
HOW???

I'm getting nothing close to that! I'll bet your display usage is much lower than mine!!! =[ :confused:
[T-Mobile Samsung Galaxy S II SGH-T989] Tanvirul:
battery

its been 16 hours for me and i still got 25% battery left

---------- Post added at 07:04 AM ---------- Previous post was at 06:37 AM ----------

and i been surfing the web using facebook and text messeging all day
[T-Mobile Samsung Galaxy S II SGH-T989] Locksmith81:
I'm running EB 1.0 w/ adrenaline shot,.super charger with blue lightning on top. Juice defender ultimate with my settings and I got almost 20+hours with moderate to heavy use with 5% left. And I am a power user!

MERCaBeast w/ Eagle and a dose of Adrenaline Charger
[T-Mobile Samsung Galaxy S II SGH-T989] Ksealy03:
I also use llama for turning data off when wifi is on. But i also turn the data off when screen is off. I still receive phone calls and text so that all that matters. 11 hours and still at %80.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Can you also post the landing page for battery stats? I'm going to add this to the OP, both screenshots together provide much more info than just one. Thanks for listing your programs though!
[T-Mobile Samsung Galaxy S II SGH-T989] Ksealy03:
Ok. . . Updated pics.
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Hoooooooly crap, 8 hours, moderate usage, 64%. Using Setcpu, on edge primarily, low brightness, syncing email, no juicedefender.

Using EaglesBlood 1.1, V6 script.
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Thanks for all the help this thread has given me, this has been my record of battery life for ownership of the phone.

So in the hopes of giving some of you something worthwhile, here are my settings: My purpose was to find the happiest medium of settings to maximize battery without compromising the features you want to have enabled.

-Today's test was primarily with EDGE only (always on), if this statement alone nullifies my whole post, you may stop reading. Will do a 4G only tomorrow.

-Rooted.

-On Eagle'sBlood 1.1 with TWLauncher, V6 Launcher RC2 Script.

-Unplugged since 4:30am, downloaded a podcast, listened for one hour on the drive to work. Moderate usage throughout the day, Pulse, GChat connected, WhatsApp connected, dozen 8M photos, Browsing.

-I have 3 email accounts synced, background data on. Coming from a blackberry, push email was the sh!t so I don't want to have it any other way. Those of you who don't need instant push may turn background data off. Widgets live: clock, Beautiful Widgets weather, 2 for Pulse, Active Applications, Google Music, Google Search, LED Flashlight.

-Brightness 10% and under. I'm indoors all day anyway.

-No Facebook updates/refreshes/notifications.

-*****SetCpu profile of screen off, 384MHz/192MHz Powersave. After 2 weeks of conducting wildly different experiments, this single variable changed my battery life of dead at 8 hours to kicking and screaming at 18 hours. No other attribute has even made a hiccup in the otherwise ruthless battery sucking. Not the silly things like dark background, Juice defender, putting phone in a hyperbaric chamber etc.

-SetCpu main at 1.35GHz/192MHz, ondemand/conservative. I kept playing around with this all day to see how the two made a difference. 'Conservative' ramps up the CPU speed more slowly; and the screen transitions reflect as such. I don't know if underclocking makes that big a difference, but the phone felt smooth still and there weren't any strange reboots.

-On Stock factory build, with 4G on and screen off killed about 1% every 10 mins, 6-8% dropped per hour.

-On Stock factory build, with EDGE on and screen off burned 1% every 20 minutes, about 3% per hour fairly consistently.

-Current settings on idle EDGE today only, about 1% per hour. Pretty huge difference if you ask me. During the idling phase, the major underclock is what's likely making the drastic improvements.

If this was helpful or if I'm full of crap, please let me know.

Thanks and I hope you guys can see better results also. Will perform a 4G only test tomorrow.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Don't lie, this is the best one :p

Nice work though! Thanks for posting such a detailed explanation, this is what we need in here for people to find their best battery life combos. The advantage I would say of Juicedefender (or the likes) is that you *should* be able to leave 4G on, as it will only allow it to connect in intervals throughout the day (assuming you set it up right).

I totally agree with the SetCpu settings though, I have seen great improvements from this as well.

The last thing I found was that I got much better battery life with EaglesBlood and the two other tweaks installed (found in the ROMS section). Here's mine from last night:

I restarted the phone in the morning as well, so I lost about ~1.5-2 hours from the timer.

I also have SetCpu running, here are my specs:

ROM: Eagle'sBlood

Tweaks: -=V6 SuperCharger=- THE Android MEMORY FIXER! & -=3G=- & -=KAK=-

dsexton702's Universal Shot XIX

Apps: SetCPu w/ two profiles:

Main: MAX -1296000 MIN - 192000 Scaling- On Demand

Screen Off: MAX - 810 Min - 432 Scaling - On Demand​

Juice Defender Ultimate (was 1.99 @ Amazon the other day)
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
its about noon time now and with 4g on consistently, I expect to reach about 12 hours plus a little nos. gonna charge now

See my above post for phone conditions and my favorite settings.
[T-Mobile Samsung Galaxy S II SGH-T989] jjcgolf72:
Ksealy03, how do you set llama to turn off 4g data when wifi is connected?
[T-Mobile Samsung Galaxy S II SGH-T989] OrrinS1189:
The CPU tuning alone has allowed me to only drop 20% in 8 hours with all other services running no tweaks! I'm doing the exact CPU tuning you mentioned and I'm amazed!!!
[T-Mobile Samsung Galaxy S II SGH-T989] happyhourtx:
best battery ever. out of the box ive been getting about 12 hours of battery. using only email, tweetdeck, whatsapp,and facebook. no tweaks. no root. no rom. txt messaging more than anything. on the vibrant i was lucky to get 4-6 hours with hardly any use.
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Glad to hear it. Do you have 4G constantly on?
[T-Mobile Samsung Galaxy S II SGH-T989] Tanvirul:
battery

i get really good battery life but im wondering why the power save icon is always on my notification bar, is it always running ? some ppl say it just means its active waiting for battery to go down to 10 percent to start
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Yes that's right. Personally I think it's fairly useless but there may be under the hood we don't know about. It takes up a much sacred notifications slot so I choose to leave it off.
[T-Mobile Samsung Galaxy S II SGH-T989] babymatteo:
Battery life on this phone is unbelievable! I went for 21hrs and still had about 15% of juice.

posted from my Eagleblood SGS2
[T-Mobile Samsung Galaxy S II SGH-T989] OrrinS1189:
Yea

I switch from E to 4G in my area. Sometimes I wish I could get 3G instead of E because I know it's "there."
[T-Mobile Samsung Galaxy S II SGH-T989] umchriswho:
basically almost everyone that i've seen that has posted a SS of their battery life, i see their

DISPLAY percentage lower than 40%

PLEASE SHOW ME YOUR WAYS, MASTER(S)!!!!

-i have brightness turned all the way down.

-i'm using juice defender

-using setcpu and following mettleh3d's method.

-both lockscreen and wallpaper are both dark colors

-wallpaper has no icons.

my DISPLAY percentage is 72%

lolwut?
[T-Mobile Samsung Galaxy S II SGH-T989] hobakill:
couldn't agree more about battery life on this phone. fantastic!
[T-Mobile Samsung Galaxy S II SGH-T989] bhowanidin:
You guys ready for some crazy battery shiznit?! Installed Llama and Juice Defender, SetCPU screen off profile, and a bomb-@ss SGSII. Still running strong.

Sent from my EagleBlood-infused SGSII or my GTab 10.1 now "In Paris"
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
You know you really shouldn't read to much into it, if you're using all the low drain methods, all that's happening is that your low usage behavior is indicating that your screen is consuming the most power. So if you're using all the battery saving tips, 72% of zero drain is still zero...

Relax babies.
[T-Mobile Samsung Galaxy S II SGH-T989] KidTech:
It's nice that people are posting how long it's lasting but they should also post their usage of the phone. Someone that posts 2 days with all these programs installed and states it's still running strong should tell us about their usage. 10 texts, 5 minute phone call and 10 minutes of web browsing on 2 days really doesn't mean anything.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
I've said this before. You need both screens to be able to get a accurate reading of that persons phone.
[T-Mobile Samsung Galaxy S II SGH-T989] giedrys:
Just got got this phone. It's beautiful.

I hate to sound like broken record, but after using 1st gen phone with fruit logo on the back for a long time I must say that SII's battery is sh.t.

I'm lucky to 24 hours of it with very, very moderate usage. 12 hours with normal usage.

I was initially thinking about 2 days of battery life. Too optimistic?

I applied some tips from thread but not sure how much that will help.

How about auto brightness? Will it help if turned off?

What about skype running in the background all the time. I need that-is it big deal on battery life?
[T-Mobile Samsung Galaxy S II SGH-T989] marleyfan61:
Ok, this is not exactly a battery life question. In fact it may be a stupid question. But I thought this is the best place for it.

I don't own an SGII (yet, still considering the Amaze) but I know there is no led notification. So.....when charging with the phone off how do you tell that the phone is fully charged? And when charging with the phone on do you have to activate the screen to check the level? Sorry for the stupidity of the question. Just another little factor in my decision making process (I do tend to mico-analyse).
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
There are lots of tips in this thread, yes 2 days is highly optimistic and impossible without some battery saving apps that turn off radio, gps, Bluetooth etc.

The biggest battery eaters are 4G and cpu speed, both of which, if possible, should be turned down when not in use ie using edge primarily (in settings choose gsm only) and if you're rooted choose very low cpu speed when screen is off with the app Setcpu.

Auto brightness should also be Unchecked, keep it constant at 20~40% or lower. Constantly pinging the environment takes power etc etc.
[T-Mobile Samsung Galaxy S II SGH-T989] outrayge:
When the screen is off, it'll play a sound to let you know that it is fully charged. If the screen is on, there's a notification informing you that it's done charging. This is all assuming that the phone is turned on. When it's off, you'll see a battery icon charging when you press the power button.

Hope that helps.
[T-Mobile Samsung Galaxy S II SGH-T989] G1_enthusiast:
jeez i dont see how you guys can justify having this phone and use EDGE network -_-"

and someone say turning off sync? just get a freaking flip phone, this is a smart phone let it do it purpose even if you cant get 15+ hours out of it.
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
My sentiments completely.
[T-Mobile Samsung Galaxy S II SGH-T989] garhart13:
mettleh3d, I love you.

Used your setcpu settings, and eaglesblood 1.1

I also have black wallpaper (which I actually like)

I have 4g always on, gmail push always on, 2-3 hours of spotify, 4 hours of internet, good amount of calls and texts.

got 31 hours out of my battery. I'll try to upload the pic later.

Amazing!
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
31 hours holy eff. excellent man.
[T-Mobile Samsung Galaxy S II SGH-T989] Drew_Dynamite04:
My biggest killer is the wireless tethering... That alone for about an hour kills eaily 30% of my batterya fter that wth alot of texts and twitter I get another 7-8 hours
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Yes, turning off auto brightness will help. However, this does depend on what you keep your brightness at. I'd recommend low, it works just fine for me here at work, when I go outside sometimes I'll slide the notification bar to the right to brighten it up to fight the sunlight but 99% of the time the lowest setting on this phone works for me. If Skype isn't showing up in your battery drain I think it's fine running in the background. If you have JuiceDefender installed it'll keep Skype from draining data except during the set intervals.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Turning sync off is ridiculous. That's where an app like JuiceDefender comes in and lets it Sync, for example, every 15 minutes rather than at free will all the time. No need to limit to EDGE.
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
I have to resort to EDGE since I use gchat and whatsapp that require consistent connection.

This morning: EB 1.1, Dsexton tweak, V6, my usual SetCPU settings, 4G on; 2 hours on battery I'm at 82% without doing much of anything.

mziol, i am seriously believing some of these members who are knocking out 14-16 hours without breaking a sweat and not thinking anything of it must have different hardware do you? I'm doing everything I can while attempting to stay on 4G and there's no topping 10 hours.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Oh I wouldn't be surprised if that was the case! One thing you could try by the way, which I haven't but; In JuiceDefender I think you can block most stuff to intervals but set exceptions for some apps to allow constant connection. Have you tried this? I mean, the way I see it I'm past my 14. My phone lasts me through the entire day when I was worried before that it would not. Here's last night. Now mind you, I did do a lot of texting throughout the day, downloaded a few APKs, installed BEAST ROM, v6 script, all without plugging in any power. I also made a few phone calls. I have noticed that draining it out to almost empty at night and then plugging it in to charge overnight works well for me. Then again, I do go to sleep around midnight and then get up at 5 or 5:30 to get ready and then leave for work.

Note that the time on this is after I flashed BEAST ROM, so it started at like ~80% and not 100%. I leave my wifi on with JuiceDefender at work where I keep the phone on my desk. After about 12 of those hours I left work and went back to Boston. During the commute I made a few calls and sent a bunch of texts when I got back in to the city (I don't condone texting and driving! Did this after I got out of the car).

Also, I have no idea why the two times are different. If anyone can chime in I'd appreciate it.
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Relying on wifi over 4G certainly helps and I'll look into the JD setting, i bought ultimate the other day. Thanks

How's beast rom for you? People are reporting improved network speeds (o_O?) and battery, whilst some bugs so I didn't jump.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Honestly I haven't had many issues. I haven't noticed a change in speed, but the whole 4G on T-Mobile vs LTE on Verizon drove me so nuts that I kind of don't care too much now. I'm old enough that for about 7 years after I got a phone I didn't have internet, and then finally got EDGE on the old Tzones hack for $5 a month for a few years until they finally removed it (bastards :D). So, long story short I haven't noticed any differences, but I could do a speed test on the Beast ROM in Boston if you'd like and post that too.

As far as bugs go, I haven't had any issues. I do have to go back and Install Swype today as I miss it, but other than that nothing has hindered my Android experience on this ROM. If I were you I'd do a backup and give it a shot, can't hurt with a backup right? You might want to migrate apps with Titanium backup or something though.
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Yeah thanks I always nandroid and Ti backup. I do like touchwiz and lots of stock Samsung apps and widgets are really good (gallery, clock, kies air, screenshot) but ill definitely take a peek.

This is my first Android, and I've been waiting for the Herc so long that I want to keep as much stock as possible.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
The BEAST ROM still has Touchwiz, so you don't have to lose that. When you first install it and go to the homescreen it'll ask you what launcher you want to use, just select use as default and pick the Touchwiz one and it'll remember that (you can change this in the applications settings, same place you'd go to uninstall apps, it'll have a little "Set Defaults" button under the app to change it in the future). Welcome to Android man, I started back with the HD2 which still to this day may be my favorite phone. The SGSII is definitely an awesome phone though (HD2 just has a special place in my heart :D) and I'm glad I made the upgrade. I use to have to charge that thing before my work day was up no matter what!
[T-Mobile Samsung Galaxy S II SGH-T989] ingenious247:
I am on the stock ROM. Not rooted. Using Launcher Pro Plus. Sync Facebook and Twitter with the LPP friends widget. Sync gmail. Wifi on all day even when I leave the house. Sync FB to contacts. Minimal Reader Pro scrollable widget syncing 7 rss feeds. No juice defender. Brightness at about 80% all day

I get 14-16 hours easy. Not sure what others are doing wrong
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Wifi conserves a ton of battery that 4G would otherwise drain. Try keeping wifi off and 4G on and report back again if you don't mind.
[T-Mobile Samsung Galaxy S II SGH-T989] ingenious247:
I don't think you understood. I mean I leave wifi turned in even when I'm not connected -which is over nine hours a day.
[T-Mobile Samsung Galaxy S II SGH-T989] ingenious247:
Also I'm running widget locker and wave launcher 24-7
[T-Mobile Samsung Galaxy S II SGH-T989] mettleh3d:
Then I hate you.
[T-Mobile Samsung Galaxy S II SGH-T989] tiguy99:
You have a freak battery! Let's trade lol
[T-Mobile Samsung Galaxy S II SGH-T989] Cuda1337:
I just got my phone a few days ago. I promptly rooted it it and installed Juggernaut 1.1. From everything I've read its supposed to give me better battery life/performance. Yesterday my battery was dead about 4 hours into the day. I hadn't really even used it and had no idea why. Last night I decided to download set cpu and set profiles for when screen is off to scale down cpu usage. Went to work today and noticed battery was down to 80% pretty quick, my connection at work constantly switches between 4g and edge. So I decided to switch to 2g mode only. Battery did better, but considering I barely used it I was at about 30% by the end of the day. That seems pretty poor to me. Not sure what else to try. Perhaps a different rom?

Are there any battery apps that will better diagnose the source of the problem?
[T-Mobile Samsung Galaxy S II SGH-T989] kennyp987:
Do a proper battery calibration....turn sync off when not needed and create a setcpu profile for screen off 385-756

Still had 30 percent at the time of the screenies
[T-Mobile Samsung Galaxy S II SGH-T989] mikea3000:
In looking over a lot of the screen shots posted here of battery usage....

i am wondering why "Android System" is so high for most of us. In most cases it is over 15%. On other handsets I have, it is usually under 5%. I have a G2 right next to me that I also use quite heavily and it is showing 2% for android system. I dont thiink we should be having it so high.
[T-Mobile Samsung Galaxy S II SGH-T989] azsl1326:
You can download Where's my Droid Power from the market and it will tell you whats consuming the most power. Also, download Battery Calibration and calibrate it once the battery is fully charged. Current is a really good widget for detecting power consumption - I used it on my Sensation. However, as of now it doesn't work on the SGII. Perhaps the developer will update it.

Hope this helps.
[T-Mobile Samsung Galaxy S II SGH-T989] 2hvy4grvty:
Great thread, thanks!
[T-Mobile Samsung Galaxy S II SGH-T989] MMakoto:
this entire thread was mainly about the battery life, but has anyone paid any attention to the temperature of the battery? i currently have two GS2 (one needs to be returned to tmo soon), on one of them-the battery temp seems to be a few degrees (3-5) Celsius higher than the other with similar settings, apps and usage. another thing i've tested and find it strange is, say battery on phone #1 is at 28 degrees, but when i switch it over to phone #2, it reads 24.xx. vice versa, phone #1 has the higher temp when i put phone #2's battery in. any ideas to this cause or i'm just thinking too much?

now i have to decide which phone to return due to other PROs and CONs each of them have.
[T-Mobile Samsung Galaxy S II SGH-T989] Cuda1337:
My phone runs very warm. Current.you 38.7c or 49ers
[T-Mobile Samsung Galaxy S II SGH-T989] ThC23:
My phone just started doing this on Monday. I was still completely stock and I was getting great battery on 4G and out of nowhere it started warming up and I dropped 40% of battery in less than two hrs. :-0. Then yesterday (now rooted and running BeastMod) it did the same and I only got like 7hrs on full charge. When I was getting like 16 hrs.

It's really weird because I didn't download anything else or changed any setting before it started doing it.

Anyone else noticing this?

Hercules Hercules!!
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
I left mine unplugged just to see. The temp is at 27.5 C.

I think that running the BEAST ROM and Juice Defender as well as the Script mod on here helped a lot.
[T-Mobile Samsung Galaxy S II SGH-T989] Cuda1337:
Wow, those are great numbers. Having display using less than 20% is amazing.
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
You have to remember this includes the night, which was about 8 hours of me watching Netflix and getting some sleep. I also have Juice Defender set to disable all data from 1-4 AM.
[T-Mobile Samsung Galaxy S II SGH-T989] tiguy99:
Wow! I want what you have lol
[T-Mobile Samsung Galaxy S II SGH-T989] matthewchiu:
I'll try to set up a test for running with/without the Samsung battery saver mode to see if it really helps. I'm pretty curious
[T-Mobile Samsung Galaxy S II SGH-T989] tiguy99:
Here are some pix of my usage from this morning after 1.5 hour.of talk time and 4G turned off
[T-Mobile Samsung Galaxy S II SGH-T989] iloveandroid16:
I get about 14 hours with moderate use, i use juice defenders to turn 4g off when screen is off.
[T-Mobile Samsung Galaxy S II SGH-T989] skadude66:
It looks like something is always awake on my phone.. Not exactly sure what it is that is draining the battery.. Any suggestions?
[T-Mobile Samsung Galaxy S II SGH-T989] mziol:
Try running Juice Defender with data every 15 minutes set and see if that changes. It looks like it's accessing stuff in the background while your phone is screen-off in your pocket.
[T-Mobile Samsung Galaxy S II SGH-T989] skadude66:
I'm finding it odd that it is only at school that I have such bad battery life, whereas at home I was able to get 33 hours on a single charge! It just seems like something is keeping my phone awake, but not really sure what :/