yashsingh1/xdaforums huggingface dataset:
[Galaxy S II Original Android Development] amitoberoi:
Battery Life SGS2

Hey all,

Like many other people here, since i have got the SGS2 i was obsessed with increasing the battery life or the best combination of modem, kernel and rom for good battery life. yesterday i decided that once and for all i shall close this issue and finalize on some setting so i can leave this battery thing behind. First i decided to check the modem which is giving the best 3g/H/H+ speeds. I tested KG5, KI1, KI3 and KI4. Speed test app was used for this and for each modem 10 tests were conducted. In all the modems i was getting H+ with all the signal bars. The signal strength for all the modems was also similar ranging from 77 to 79 dbm and 17 to 19 asu. The tests for all the modems were conducted by keeping the phone in the same position. At no time during the tests was the phone moved. I know that the network behaves differently at different times but over a range of 10 tests for each modem i got fairly consistent results. KG5 gave the worst speed. KI4, KI3 and KI1 gave more or less similar speeds but one thing i observed was that in KI4 and KI3 there were data hangups and network problems which was not observed in KI1. So i finally decided that KI1 is the modem for me as there were no network problems and the speed was also amongst the best of the 4. My logic here is that in the situation of a network problem more battery would be consumed as the phone would continuously try to get connected to the network thus consuming more battery. Also i had read somewhere that KI1 is the best modem for battery life. So KI1 was the winner here for me.

Next came the kernel test. As per me, the daily usage is a very poor indicator of the kernel performance as every single day our usage pattern is different. In my case, voice calls is the biggest battery drain as my voice calls range from 1.5 to 2.5 hours and thus i cannot judge the performance of a kernel in regards to battery based on my daily usage. Also i am a bit impatient by nature and testing over a period of days is not my cup of tea. So i decided that i would use the app Fast Discharge for testing the effect of different kernels on battery life. Flashing a kernel, i enabled fast discharge with all the options checked except vibration and continued like this for 5% of the battery life and in noted the time consumed for finishing this 5% battery life. This was repeated with all the kernels tested. I tested Siyakernel 2.2 beta 9, Speedmod K16, Speedmod K18t1, Speedmod K18t2 and speedmodK18t3. Out of these i found that Speedmod K18T3 was giving me the max time for consumption of 5% battery. So i decided to use it. Regarding ROM, Clean and Simple by MrPhilo has been my favorite for some time and i use that only. All these tests were done using Clean and Simple 1.3.

Hope this helps somebody and maybe someone can conduct there own tests and share the results.
[Galaxy S II Original Android Development] byobodybag:
Huge wall of text crits my eyes for 1000000 internet hp. x_x

Fatality.
[Galaxy S II Original Android Development] coolfire:
Though i do not have the stats & wall of text to backup my claims :p , K2-18 Test 5 seems to give me the best deep sleep, and management of cpu speeds during usage. :)

hardcore/SpeedMod FTW!!! :D
[Galaxy S II Original Android Development] Jonjungle:
On K17-test1 I got 2days+, On K18-test1 I got 1day 16hrs same usage but the battery seemed to drain a lot quicker [same on test 2-3]. I also noticed that I had higher times on 200Mhz frequency instead of deepsleep then the minute I switched back to K17-test1 it changed to more deepsleep as normal.
[Galaxy S II Original Android Development] amitoberoi:
Its not about claims buddy and i am definitely not gonna get any prize by writing a wall of text. The only intention is that since i have received so much help from the members of this forum, this is just doing my bit. maybe it will help someone, maybe not. And if K18t5 is giving better results that k18t3, believe me i would be amongst the first to change kernels.
[Galaxy S II Original Android Development] didopidobg:
Thank you mate, I found these observations very useful. I am now with KI4 but I`ll give a try to KI1.

cheers
[Galaxy S II Original Android Development] alexkno:
Was same for me. But on test 5 I had 96% deepsleep last night. Seems promissing
[Galaxy S II Original Android Development] Jonjungle:
trying it out now :)
[Galaxy S II Original Android Development] zolom:
Thanks for all your efforts. I really like your kernels. Currently I'm using version 16 with satisfactory response and battery life.

I did encounter several crashes with version 18 (test 1 and test 3), after which the battery was totaly drained. see the attached screenshot taken with test 3. I use the Villain 3.0 rom.
[Galaxy S II Original Android Development] coolfire:
Relax dude. Maybe my choice of words were not appropriate. ;)

Appreciate your information, rather than mine, which are based on feel. :D
[Galaxy S II Original Android Development] amitoberoi:
maybe my reply was also a bit heated ;):)
[Galaxy S II Original Android Development] gasmias:
+1 for k2-16, after testing 16, 17, 18.1 and 18.3..
[Galaxy S II Original Android Development] It_ler:
Similar results for me running SpeedMod K2-18 test5:

Phone on all night with wifi and synch on => about 5% of battery loss.

Now testing my "normal" day use.
[Galaxy S II Original Android Development] AndroidGX:
18-test1 and 3 : 2% lost overnight in 6h47.

18-test5 : 4% lost overnight in 7h20.

test1&3 is still the best for me for idle drain then. Actually testing normal day use with test5.
[Galaxy S II Original Android Development] Vahidmoby:
@ Hardcore

Between 16 and 17 and 18 test 1-2

i'm getting best result with 17 (testing on 2 phone with different Rom and Apps)

but these days i'm realy busy with my university study (or something like that :D)

and now i'm flash 18 test 5 ( i heard test 3 give us better battery Life (i will flash it after Test 5) )

performance is amazing

but i will let u know about Battery Life After Fully charge and Dischargin' to 1% :D

thanks for ur Great Kernel :)
[Galaxy S II Original Android Development] concertiste:
@hardcore

I always let wifi and gps on, also charger even when I was sleep. I can't help you for discovery bettery. Only an information that I can reply here that in 18 test 3 & 5, wifi will disconnect automatic while a few minuet don't use. I used Samsung KI3 rom with CF-Root and your great Kernel!
[Galaxy S II Original Android Development] spirt:
not a big issue but Call Recorder by skvalex doesn't work with SpeedMod kernels :( always FC while trying to record any call.
[Galaxy S II Original Android Development] kartalgurhan:
k2-18 test 3:

- been testing for the last 2 days

- no kernel wakelocks

- 4-5 % drain overnight with 7 hrs of sleep (the mininmum it should be anyway :))

- very responsive, snappy

- works flawlessly with the new Cognition 777 r2

thank you hardcore!
[Galaxy S II Original Android Development] Rintenfinten:
Same here!
[Galaxy S II Original Android Development] Igr1:
Call recorder works perfect for me.

It could be depend on ROM.

Sent from Tapatalk using HTC HD2.
[Galaxy S II Original Android Development] richyy74:
For me k18test5 is perfectly smooth, no issues so far. Battery life looks promising too.

Sent from my GT-I9100
[Galaxy S II Original Android Development] mariosraptor:
Use total re all. Works greT.
[Galaxy S II Original Android Development] shahulvm:
stunning battery life with k18-test3

Attaching the image for battery stats for k18-test3...just to reaffirm..that it had stunning battery life...
[Galaxy S II Original Android Development] Fille84:
And whats the screentime?
[Galaxy S II Original Android Development] ozzyblack:
K13

best battery live ever
[Galaxy S II Original Android Development] spirt:
are you talking about skvalex's Call recorder? i tried this prog on various ROM and never succeeded with SpeedMod's kernel :( Total Recall is not the best replacement. IMHO ;(
[Galaxy S II Original Android Development] jgcastror:
I am on k2-16 until k2-18 leaves test period, k2-16 really is a very good good kernel
[Galaxy S II Original Android Development] hongkongtom:
Guys, no matter what I tried, Wi-Fi still appears to drain more battery than 3g for me, not mentioning 3-4% drain overnight. (The most I have is 1% for 45min for 3g data with Fast Dormancy Off) still need to do more testing.( I'm using 18test3)

Besides, I found touchdown was contributing to a Partial Wakelock, however, I've already set manual sync, don't know why this happened. Can anyone advise?
[Galaxy S II Original Android Development] alexkno:
so, just another update on test5: Now I have running a battery cycle since 6 hours. Lost 5% only (looks very similar to K17). I didn't use the phone more or less (5min display on time) but 3G was active (fast dormancy on) all the time.

Seems very promissing. When home I'll play and surf a bit to see what is the situation when not in deep sleep but active
[Galaxy S II Original Android Development] ukdtweak:
I have tested K2-16, 18 test 1 and test 2, on all three my biggest problem is wifi...

It seams to disconnect itself after a period of the screen being off, even though I have the wifi policy set to never.

Also, my wifi won't connect when i'm in my bedroom, but with Chainfires CF-Root kernel, wifi works fine, is there something in the kernel that could reduce wifi power?

I would love to stick with K2-16, for screen brightness, battery life etc... but having unstable wifi upstairs is no good :(

Currently running Kitchen Rom KI8, with KI3 modem and CF-Root 4.3, seams to be the only combination that will allow my wifi to work upstairs, Rom came with KI1 modem, but even with CF-Root, wifi was hit and miss upstairs, even tried different channels on the router... on my previous Stock & Branded 3 rom, running 2.3.3 and CF-Root, wifi was also fine?
[Galaxy S II Original Android Development] LiFE1688:
Did you install a battery application, like: Juice Defender, Battery Saver, etc?

These applications will overwrite your settings and will turn off the wifi to save battery power regardless if you set WiFi to never sleep.

You will have to change the settings to these battery applications.
[Galaxy S II Original Android Development] djunited:
im using speedmod k2-18 test 2 with checkrom 3.1.1 and i must say my phone has never been than smooth and to think its only at 1200mhz is amazing. battery life however is not so good. only 2 hours screen on time with 28% left normal use, no games. im tempted to try test 5, been reading that it has better battery life than test 2, but not as smooth? does anyone play asphalt 6 on this kernel? i noticed it can lag slightly when there are too many cars on the screen at once, it also lagged when i was on stock kernel. it didn't lag however on stock samsung rom. anyway thanks for the great kernel :D
[Galaxy S II Original Android Development] akbarhash:
Asphalt is one big battery drainer. Try the test 5 as smooth as 2 and better battery life.

Sent from my GT-I9100
[Galaxy S II Original Android Development] ukdtweak:
Never installed such apps, just a stock ROM with no power saving settings enabled.
[Galaxy S II Original Android Development] dica:
No lag here with asphalt, and I agree if u want to drain your battery just play one hour with asphalt
[Galaxy S II Original Android Development] stylez:
Defo as smooth as 18 test 2 and 17 test 1, to which tend to use as reference since using from k2-7, 17 test 1 stands out but after using K2-18 test 5 i'll be sticking with the later .
[Galaxy S II Original Android Development] obionenairobi:
what is the better version for battery and response:

k18-t1 or k18-t5?
[Galaxy S II Original Android Development] tkalli:
I agree. k2-18test 5 is great.​

k18-t5 IMOP​
[Galaxy S II Original Android Development] hardcore:
K2-18-test6:

- Updated patches to ARM topology

- Re-enabled and tweaked CPU hotplug

This version should have a good combination of smoothness and battery life.
[Galaxy S II Original Android Development] apeiron6:
I'm wondering if it is posible to change reaction time switching cpu frequences?
[Galaxy S II Original Android Development] obionenairobi:
OMG, just ready to dowload the K2-18 test 5 and it is gone

Can anyone share a link where I can get it ?
[Galaxy S II Original Android Development] tonysac:
Already installed..as concern smoothness is like k18-2..in other words...brilliant...lets see battery!

Sent from Galaxy
[Galaxy S II Original Android Development] ram3n:
Here you go, dude :

speedmod-kernel-s2-k2-18-test5

http://www.multiupload.com/9VSQDK8CYO

Cheers :D
[Galaxy S II Original Android Development] AndroidGX:
18-test5 : just got a random reboot (due to kernel, as it was not a full reboot with samsung SGS2 logo).

Battery life was good, slightly better than 18-test1 and test3.

Gonna try test6. :)
[Galaxy S II Original Android Development] Jodelaplaya:
Test6 is sooooooo fast.. Lets check battery life ;)
[Galaxy S II Original Android Development] BrandoHD:
Had a very weird occurrence earlier today on 18 test 5, I pressed the home button to wake up the phone and got no response, i tried pressing the power button and there was not any response either, after doing this for roughly 10 to 15 seconds, I pressed the home button repeatedly and the vlingo voice app started, so the phone was awake but the screen was totally off.

In the end I was about to pull the battery, but I first decided to plug it in as the screen usually turns on when you set it to charge, the screen came on, has anyone else experienced anything like this: KJ3 stock rom with KI3 radio and speedmod kernel, I have no apps installed to manipulate CPU in any form or fashion

Trying test 6 now
[Galaxy S II Original Android Development] lrcquest:
can anyone suggest a custom rom which is

1) most compatible with speedmod

2) most likeliness to stock & has minimal (dangerous) system hacks

3) has good stability

4) can give the best battery life

5) can support themes

I know that there can be many choices from the original android dev section. But am really puzzled as to which one should go for....
[Galaxy S II Original Android Development] interfreak:
Have a look at my sig. That combo runs like a dream!!
[Galaxy S II Original Android Development] emilcioran99:
See my signature. :D
[Galaxy S II Original Android Development] alexkno:
Damned due to the great battery live of test 5 I didn't finish a single battery cycle on it;)
[Galaxy S II Original Android Development] :
Anybody has seen this?

http://xdaforums.com/showthread.php?t=1351191

I won't try it nor like it, but I'm curious to see its performance.

Cheers and hail to the king hardcore!

Sent from my SGS2 - powered by Checkrom Revo 3.1.1 | Speedmod k18 | Vertumus ICS Theme |
[Galaxy S II Original Android Development] alexkno:
Cook one deodexed stock rom with speedmod, use ki8 from kitchen with jkay theme. Great!!!
[Galaxy S II Original Android Development] mariotme:
Can't go wrong with any kitchen ROM :)
[Galaxy S II Original Android Development] interfreak:
Speedmod 18(6) is smooooooth!! Best 'test' so far. :)
[Galaxy S II Original Android Development] planetf1:
A few days ago I mentioned some strange issue where power drain was high whilst on office wlan.

Since then it's happened a few more times, so I'd wondered if it was the updated wifi drivers -- but it's also occurred once with Siyah so I'm pretty sure now it's not kernel specific - phew. Causes system to stay awake with moderate drain rate (similar to screen on), even with pretty much all apps/processes zapped. Corporate wifi only (eap-tls)

Probably time to persue on a different thread. Need to figure out what other system stats I can check , possibly reenable some logging, see if wireshark helps (on device). see what wpa supplicant is up to.

Anyway probably won't mention this here again, I think it's now looking off-topic, just wanted to close out.

Started new thread http://xdaforums.com/showthread.php?p=19447266#post19447266

Meanwhile loving the kernel.
[Galaxy S II Original Android Development] It_ler:
Can agree so far.

SpeedMod K2-18 Test6 seems to be as fast as Test5 - although slightly slower than Test2.

Now having to test SpeedMod K2-18 Test6 for battery performance.

P.S.:

Test6 had about 4400 points on Quadrant Standard (similar to Test5), in CF-Bench the native score is a little bit less than Test5 but java score (and as consequence overall score too) is a little bit better than Test5.

Other benchmarks just showing nearly the same results.

So, again another SpeedMod kernel which is faster than every stock kernel I had on my phone.
[Galaxy S II Original Android Development] KennyLegend:
Rom kitchen ki8, kj2 or kj3 are all excellent roms by Tricky103 . Ki8 has the best theme compatibility and prob my favourite .
[Galaxy S II Original Android Development] djunited:
test 6 is as smooth as test 2. will be testing battery life

asphalt 6 still lags when alot is going on,then smoothens out until alot goes on again :D
[Galaxy S II Original Android Development] nikzDHD:
Test 6 as mentioned fast and smooth no lag issues, will test battery life tomorrow. Keep them coming hardcore.
[Galaxy S II Original Android Development] AMDPOWERFIST:
So far from a few days of testing while sitting at my work desk bored ****less....

test3 had a 104mA drain (Battery Monitor Widget) - 30minutes rest after restart / widget drain record value

test5 has a 87mA drain (Battery Monitor Widget) - 30minutes rest after restart / widget drain record value

test 6 has a 43mA drain (Battery Monitor Widget) - 30minutes rest after restart / widget drain record value

Battery Monitor Widget app info located here:

http://xdaforums.com/showpost.php?p=19416214&postcount=4418

test 3 had a 4307 (3rd attempt) quadrant score

test 5 had a 4723 (3rd attempt) quadrant score

test 6 had a 4652 (3rd attempt) quadrant score
[Galaxy S II Original Android Development] interfreak:
I'm noticing *some* lag creeps in after a while on K2-18(6). Just cleared the Davlik-cache and Cache and rebooted.
[Galaxy S II Original Android Development] djunited:
which fixed the lag?
[Galaxy S II Original Android Development] interfreak:
Seems to.

I think the UI just gets slightly bogged down after 30mins or so of use.
[Galaxy S II Original Android Development] AMDPOWERFIST:
it doesnt really matter which fixed the lag - both achieve behind the scene actions that arent noticable to anyone who isnt a developer. Both cache and davlik should be wiped before installing a new Kernel - and i do it afterwards as well, cant hurt, it only takes 3 seconds max...
[Galaxy S II Original Android Development] ludester:
I definitely notice that K18-test6 uses less battery. Will have to do a full test tomorrow as I used my phone on skype heavily today on test5 earlier in the day.

But koodos to Hardcore, I think you may have your k2-18 final release :D
[Galaxy S II Original Android Development] interfreak:
Yup agree 100%. Had already done this before and after installing K2-18(6) though.
[Galaxy S II Original Android Development] n00n00:
Found test 5 to consume more batt for me.

On vr3.0

Trying out test 6 :):)
[Galaxy S II Original Android Development] Radikaal:
Might also be issue with Checkrom 3.1.1. I am noticing the same thing, ive tried atleast 10 different kernels (speedmod versions and siyahs thats been smooth&lagfree before). Incredible speed at start mostly, but after around 1 hour i get some annoying lags from time to time. Never had this problem before :mad: and dalvik&cache has been wiped a number of times.
[Galaxy S II Original Android Development] hansation:
i dunno but k2-18 test6 drains on my phone, did wiped.. my favorite is still k2-18 test3 in terms of battery. i am still gonna monitor test6..
[Galaxy S II Original Android Development] iggybuenaventura:
I think test 5 is faster than 6. Test 6 was fast right after flashing but after a few hours it feels slower.
[Galaxy S II Original Android Development] Thedonk13:
Check my signature...runs smooth and LOOOONNGGG.....ICS theme looks fantastic!!
[Galaxy S II Original Android Development] Tyrol:
Test5 seems to have greater idle drain than Test3.

Overnight, Test5 drained ~9% while Test3 drained ~5%, over 7.5 hours. Also, if Battery Monitor Widget is accurate, Test5 drained 19mA during idle while Test3 drained 11mA during idle.

I did notice that Test5 seemed smoother than Test3 as well, though, less stuttering and lagging (not that that happens often with Hardcore's kernels ;D).

Moving on to Test6.

------------

Tapatalking to the beat on Galaxy S II.
[Galaxy S II Original Android Development] shahulvm:
I would confirm on the same...I had 2% overnight battery drain for a period of 8hours. At the max 3%. This was with partial sync on, 3g on, brightness set to minimum...not much wake locks...and had fantastic deep sleep...(18-test3)

I am using wanamlite rom which has battery tweaks as well..I am geting roughly around 2 days for light to medium usage...

With a combination of wanarom (http://wanamlite.com/2011/11/16/wanamwite-kj3-v5-8-tweaky-edition/) and kernel speedmod k218-beta3, i feel more contended and not willing to take on any more experiments...as i feel we need to mark a level of satisfaction against a never ending expectations...

As an eye candy, I use the ICS theme v4.2 by bigbandhd

---------- Post added at 11:28 AM ---------- Previous post was at 11:20 AM ----------

I ahd spent nearly two weeks and tried more than 6 roms, tested 4 kernels, tried 3 themes and 10 radio modems. Following was the most satisfactory for me...

Kernel - Speedmod 18-test3

Rom - Wanamlite v5.8 (slim rom with good battery life tweaks)

theme - v4.2 ICS theme by bigband HD

Modem - XXKI4

Reading the recent posts, I see the phone make and experience varies...if I analyse correctly, I see some set of people getting good battery life with k17, k18-test1,2 etc...and another set of users getting good battery life with k18-test3
[Galaxy S II Original Android Development] nickporwal:
Test 6 is as smooth as Test3. Speed is good and battery life is also balanced. I would say test6 has the right kind of balance between speed and battery.

To me battery life of SGS2 is already good compared to other similar smartphones.

Nice work hardcore!
[Galaxy S II Original Android Development] interfreak:
Gonna try my current set up in my sig with the Wanamlite ROM (instead of CheckROM) and see how I go..
[Galaxy S II Original Android Development] shahulvm:
Checkrom was good but wanamlite is bettetrr imho

Checkrom was good but I had gps issues...i did the usual tweaking of gps.conf...added parameters to it etc.. nothing worked.. Only certain applications were effected by the gps use. hence switched to wanam.
[Galaxy S II Original Android Development] Vahidmoby:
i think Somethings Going Wrong with performance of Test 6 (lag and two random reboot after an Hour)

everytime i wanna flash a new version doing

Wipe dalvik & cache

with previous version i hadn't these issues

The Best Version FOr me(Performance and battery): 17 test1 and 18 test5
[Galaxy S II Original Android Development] AMDPOWERFIST:
Using ROOT EXPLORER (or another file explore program that has access to ROOT) go to:

SYSTEM / ETC / INIT.D and delete the script that starts with "S.. VOLT.." (cant remember what its called but its designed to undervolt the phone by default and could be the cause of instability)

Then restart your phone.
[Galaxy S II Original Android Development] interfreak:
Have changed to the Wanamlite ROM, with the same settings I had before (in my sig) and there is ZERO LAG with K2-18(6). CheckROM appeared to be the cause of the lag...
[Galaxy S II Original Android Development] shahulvm:
I dont think speedmod kernel supports undervolting. Script being in /etc/init.d shouldnt affect voltages, but yes it may have other impacts like governor change..etc
[Galaxy S II Original Android Development] fr3quency:
problem with LATEST kernel. Dynamic colour under settings isn't displayed correctly. it gives me something like normal. :) Both on STOCK XWKJ3 2.3.5 ROM and Cognition 777 r2 based on XWKJ3. Reversing back to stock kernel, obviously d'oh, fixed the problem.