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Old March 21st, 2012, 09:47 AM   #1 (permalink)
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Default battery life after official upgrade to to Android 4.0.3.

Hello!
After upgrade my Samsung galaxy S2 to newest firmware 4.0.3 with samsung kies battery life decreases approx 100%. Before upgrade my phone on full battery charge can work 48 - 72 hours. After upgrade my samsung galaxy S 2 can work only 12-18 hours. Is this bug in firmware?

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Old March 21st, 2012, 10:12 AM   #2 (permalink)
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Yes. Mine is still good if not better after update! With extended battery and data/GPS on all day I can get 2 days with ease with moderate use.

I suggest checking the Task manager to see if any apps are going crazy on the CPU!

(BTW I started a thread on ICS issues, might be worth checking there!)
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Old March 22nd, 2012, 07:11 PM   #3 (permalink)
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Unhappy Galaxy S2 battery woes after Android 4.0.3 upgrade

Hello, I have the international (unlocked) version of the Samsung Galaxy S2. After being upgraded to Android 4.0.3, I've had some horrible problems:

- battery life dramatically reduced, from 8+ hours to less then 90 minutes, when the phone is simply idle
- battery recharging takes 5+ hours, instead of less than 30 minutes
- third party texting software like Handcent are duplicating every outbound message twofold.

I've found similar problems mentioned on this forum; have tried a variety of solutions, but none have worked. Am hoping for suggestions... thanks!

Things I've tried thus far:
- manually disabling some of the built-in Samsung apps
- pop out the battery, push it back in (then restart the phone), to force a battery recalibration

I have automatic background app killer software installed;

According to the developer's view, 60+% of my battery is being drained by the Android OS itself.

Sounds like a very buggy upgrade?

I'm about to just completely reset the phone, but am hoping to avoid this dire course if possible.

Many thanks.
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Old March 22nd, 2012, 08:06 PM   #4 (permalink)
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Hello!

Few things I guess. Firstly, your SGS2 should've lasted a lot longer than 8 hours previously. I used to get over a day easily with lots of tweaks, so about a day should be average (unless you're playing a lot of games). What's your usage like?

Next, your battery recharged in 30mins? Was this from 0-ish%? Because it would seem if it only took 30mins that there's a bug in your battery monitor, which is giving incorrect readings. Could also explain to low battery life.

I guess with the manually disabling of Samsung apps, that you're doing that through Settings? If so, that gets undone at a restart. It's probably not the best way to ensure the apps are really closed. I'd suggest rooting and using Titanium Backup to freeze the unwanted apps. All you need to know about rooting and freezing apps is located here.

I'm stealing ironass' words, but automatic task killers actually drain more battery than they save. I'd suggest disabling that, and also not clearing memory in RAM if you're doing that too.

The ICS upgrade in general has a poorer battery life than GB. This is in part due to a lot of new features designed to enhance the performance of the device. They didn't put as much effort into battery saving unfortunately, which is where rooting and custom ROMs/kernels comes into play.

If you're not into that sort of thing, there's a couple of things that can help save battery:

- Turn off Gmail sync, it's a battery killer
- Download BetterBatteryStats (BBS) from xda here. Restart your phone, open BBS, and leave your phone idle for an hour or so. Then go back into BBS and use the dropdown boxes to see Partial Wakelocks and Kernel Wakelocks Since Charged. You'll then see what the main culprits are for using battery while the phone is idle. If it doesn't make much sense, take a couple of screenshots and post them up and someone here should be able to interpret them
- Obvious things like disable wifi/bluetooth when not required and use automatic brightness/power saving modes where possible.

Hope that helps!
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Old March 22nd, 2012, 08:22 PM   #5 (permalink)
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Will try those things and report back to this thread thanks. Rooting isn't something I've done before (nor am I afraid to try) -- but it does seem a bit extreme (?) solution - i.e. shouldn't things be "reasonable" within the vendor-supplied sandbox that is the default installation?

Yes, I had covered the basics you'd mentioned (e.g. Wifi/Bluetooth both off; background syncing mostly off, etc).

My usage runs fairly intense (videos, music streaming, etc).
But even when the phone is idle, and all those activities disabled, the battery is still slow to charge, quick to drain.

I had installed the automatic background killer initially because without it, my phone drained within ~1 hour. (With installed, I'd get 7+ hours).
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Old March 22nd, 2012, 10:01 PM   #6 (permalink)
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I would love to see your BetterBatteryStats screen to find out what you've got running that drains your battery so horribly! Instant Messaging programs like MSN/Skype, or other programs that constantly access the 3G/wifi connection can seriously drain your battery if left running.
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Old March 24th, 2012, 12:39 PM   #7 (permalink)
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Also, as mentioned in other threads, upgrading to 4.0.3 resets the phones battery optimisation. Thus, it takes a few days for the battery usage to even out, just like when you first got your phone.

My battery life did drop initially on upgrading but after about 4 days, seems to have got back to its original level, if not slightly better.
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Old March 24th, 2012, 12:41 PM   #8 (permalink)
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Quote:
Originally Posted by aaronfi View Post
Hello, I have the international (unlocked) version of the Samsung Galaxy S2. After being upgraded to Android 4.0.3, I've had some horrible problems:

- third party texting software like Handcent are duplicating every outbound message twofold.

Many thanks.
Search xda. There is a beta of Handcent (?Version 4) that solves the double message issue. Just download and install the apk and voila. Your existing Handcent settings are preserved.
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Old March 24th, 2012, 01:45 PM   #9 (permalink)
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Default my battery life time sucks with 4.0.3

Just upgraded my gs2 and my battery only lifes up to 12h IN STANDBY.
I really love ics but this doesnt work for me. Now I must charge it several times a day.
It takes lika 5h to charge it full.

Please. Help me!
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Old March 24th, 2012, 03:13 PM   #10 (permalink)
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Quote:
Originally Posted by Kie View Post
I would love to see your BetterBatteryStats screen to find out what you've got running that drains your battery so horribly! Instant Messaging programs like MSN/Skype, or other programs that constantly access the 3G/wifi connection can seriously drain your battery if left running.
Here are my BetterBatteryStats:
Not quite sure how to read or report them.

Note: in the past 1-2 days, my battery life has somewhat improved, through no intervention on my part. Lasting around 7.5 hours now. Charging from 0 to 100% still takes 4+ hours.

The most suspicious stats:

Other --> since unplugged: 6:39:37 awake, 0:57:58 Screen On
Kernel Wakelocks --> since unplugged: 4:40:37 multipdp, 2:12:2 PowerManagerService
Partial Wakelocks --> since unplugged: 2:20:34 MAIL_SERVICE (com.android.exchange.Exchange Services)

Might this be my Outlook Exchange that's eating up all my battery? (It didn't prior to the Android OS upgrade)

Many thanks
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Old March 24th, 2012, 04:42 PM   #11 (permalink)
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i just roll back to GB 2.3.5 using Odin since ICS was just waste of time and nothing special, suck battery life out of it i only get 10hr out of ot,that With extended battery 2000hz compair to GB i get 3day out off it.
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Old March 26th, 2012, 11:20 AM   #12 (permalink)
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Default Battery life significantly reduced. Seems like auto sync is always on...

I hav et the same problem with my Galaxy S2, after upgrading to Android 4.0.3 bettaery life seldom exceeds 10 hours. I have set my GS2 to sync. with exchange every 15 minutes during working hours and every 4 hours outside working hours. Bu no matter what settings I use, even set i to manual, e-mails are pushed to my GS2. I have tried to apply "push" when I bought my GS2, and I observed that battery life then was 10 hours, so it seemd like I'm stuck ion push mode - no matter which sync settings I'm using, which reduces battery life! Any ideas to correct this behaviour?
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Old March 26th, 2012, 01:52 PM   #13 (permalink)
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menu->settings->battery

click on the graph, check to see how much the phone is in awake time. If it's constant then you have an app that doesn't play well with ICS.

You'll then have to go back one screen and click on each app and see what the culprit is by the keep awake display.
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Old March 27th, 2012, 01:51 AM   #14 (permalink)
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You can get BetterBatteryStats. It identifies what causes partial wakelogs that keeps the phone awake when its not suppose to. That way you can uninstall the offending app (if possible), or if rooted freeze it.
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Old March 27th, 2012, 03:44 AM   #15 (permalink)
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I was really worried when i upgraded to ics, my battery lefe plummeted to around 5-6 hours. It seems to be improving now, at the moment it now gone to 16 hours. But i am still monitoring the situation
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Old March 27th, 2012, 04:00 AM   #16 (permalink)
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I upgraded about a week ago and experienced the same battery problem as everyone else here.
It has now improved SLIGHTLY, but not much.
The real killer that I have discovered is the Exchange Mail Push function. When this is on it really pulls the plug on my battery. Hate it!
So most of the day I have Exchange Mail Push switched off. Other than that I really like the new functionalities.
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Old March 28th, 2012, 08:06 AM   #17 (permalink)
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Quote:
Originally Posted by aaronfi View Post
Here are my BetterBatteryStats:
Not quite sure how to read or report them.

Other --> since unplugged: 6:39:37 awake, 0:57:58 Screen On
Kernel Wakelocks --> since unplugged: 4:40:37 multipdp, 2:12:2 PowerManagerService
Partial Wakelocks --> since unplugged: 2:20:34 MAIL_SERVICE (com.android.exchange.Exchange Services)

Many thanks
Hi aaronfi. Did you make any progress on this? I am seeing the same results (although not quite as extreme as yours); similar proportion of awake compared ro screen on, and the same two culprits in Kernel Wakelocks and Partial Wakelocks!

Cheers

Jon
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Old March 28th, 2012, 06:43 PM   #18 (permalink)
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For me, the problem is Exchange email. The Exchange service goes crazy (well, runs at a steady 2-3%), and the phone gets noticably warm. If I change the exchange sync settings (e.g. from 'every 15 mins' to 'every 30 mins', or vice versa) the problem goes away for maybe 12 hours. Then I notice it getting warm again, and so change the sync frequency again. System Monitor pro records a CPU usage graph per app, so I can clearly see the Exchange Service high usage corresponds exactly to the battery plummeting.

If I wasn't so trusting, I'd say this was Google's way of persuading people to ditch their exchange servers in favour of Gmail. ;O)

Hope this gets fixed soon. I might even disable email syncing altogether and see how that goes...it's not too big a hassle I guess, the new ICS Inbox widget has a 'refresh' button onscreen so it's not too hard to check for mail manually when we want to.
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Old March 29th, 2012, 09:14 AM   #19 (permalink)
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Hi there,
The same problem after update. Just found, that for some reason Voice settings were changed during update automatically. Hope, the problem with battery drain was caused by this.

You know, there is 'Wake up on command' voice-related feature with footnote 'this may drain your battery'. For some reason it was turned on...

Check it on your devices. Hope this will help.
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Old March 30th, 2012, 06:08 PM   #20 (permalink)
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Hi Jon.
Still no progress with my issue.
It takes ~10 hours to fully charge my battery, which then discharges in 3-5 hours.

It's very frustrating. I have the Voice "Wake up command" turned off, and the Exchange Service syncing set to "manual" (instead of "push").

Still no change.

Any other diagnostic or troubleshooting ideas?
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Old March 31st, 2012, 02:22 PM   #21 (permalink)
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Default Draining battery

Ive had the exact same issue with my S2 since my Android 4.0 upgrade. The battery last for 4-5 hours now. Before the upgrade it lasted 12-14 hours. Ive also noticed that it gets extremely hot lately. Some times charging doest do much at all. Left it on for an hour, and when I pulled it out it still screamed that it needed charging... I read in a post some times back that a factory reset would fix the problem. I therefor tried that a week ago, and it actually helped. Phone worked like normal again, without any huge battery usage. However, today it became bad again, draining battery like a sinking ship... So now Ive factory reset it again, expecting another week of peace bofore hell breaks loose again.... *sigh*.... What I love most is the lack of ANY feedback from Android/Samsung on the problem.....

Heeelp...
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Old March 31st, 2012, 02:29 PM   #22 (permalink)
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While i did not have any issues with the S2 i also have a Asus Transformer and had the same issue the only way i solved it was a factory reset. Problem was then solved it was a app not playing ball with ICS i could just never find out what it was. As after installing every thing from the market again it never come back
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Old March 31st, 2012, 10:55 PM   #23 (permalink)
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I've actually seen better battery life in ics than gb i get about 8hrs more now
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Old April 12th, 2012, 06:13 AM   #24 (permalink)
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Quote:
Originally Posted by kimjon View Post
Ive had the exact same issue with my S2 since my Android 4.0 upgrade. The battery last for 4-5 hours now. Before the upgrade it lasted 12-14 hours. Ive also noticed that it gets extremely hot lately. Some times charging doest do much at all. Left it on for an hour, and when I pulled it out it still screamed that it needed charging... I read in a post some times back that a factory reset would fix the problem. I therefor tried that a week ago, and it actually helped. Phone worked like normal again, without any huge battery usage. However, today it became bad again, draining battery like a sinking ship... So now Ive factory reset it again, expecting another week of peace bofore hell breaks loose again.... *sigh*.... What I love most is the lack of ANY feedback from Android/Samsung on the problem.....

Heeelp...
I had all the same problems after the upgrade. But, I started deleting programs and nothing seemed to help. Then, I was playing with the settings and saw the battery on the settings menu. One program was really chewing up the battery so I uninstalled it. Then, voila, the phone cooled off and the battery has lasted all day with a lot of use. Hooray. Just thought I would share. Also, I found built into this version is another place called Developer Options on the settings menu. It is very interesting. I tried checking some of the options for upgrades and at one point in time, there were so many flashes I couldn't even read the phone. Had to uncheck most of them.

Hope this helps.
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Old April 14th, 2012, 10:03 AM   #25 (permalink)
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I upgraded yesterday via kies on vodafone. My battery seems to be far better than when it was on gingerbread 2.3.5. Im soooo happy with the battery life. I assume that because vodafone took ages to release it that they have ironed out most of the bugs.
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Old April 15th, 2012, 02:47 PM   #26 (permalink)
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Hi All

I am having same problems. Phone hot and battery being drained even when unused. Have followed as much advice as possible from above. Main thing draining mine seems to be the google calendar sync.

Even when idle I am using 474MB of the 831 available. When I click 'clear memory' it closes 23 applications and drops the usage to 384 but then it creeps up again.

I am struggling to get the battery to even last a couple of hours!!! Any news of an update/fix or am I scratching around for a solution.

Many thanks in advance.
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Old April 19th, 2012, 02:06 PM   #27 (permalink)
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I was just about to upgrade from 2.3.4 to 4.0.3 until I read this thread. Now I'm hearing the battery is dead after a few hours? Thats scary.

At the moment on my rooted stock 2.3.4 S2, phone 100% at 5:15am, and drops to about 35% at 11pm. Although I have a car charger, I'd rather not have to keep charging the thing, as I heard it shortens the overall battery life?
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Old April 19th, 2012, 02:11 PM   #28 (permalink)
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Quote:
Originally Posted by jammie1212 View Post
I upgraded yesterday via kies on vodafone. My battery seems to be far better than when it was on gingerbread 2.3.5. Im soooo happy with the battery life. I assume that because vodafone took ages to release it that they have ironed out most of the bugs.
Same here on unbranded, battery is definitely better on ICS than GB.
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Old April 19th, 2012, 02:24 PM   #29 (permalink)
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Although I have a car charger, I'd rather not have to keep charging the thing, as I heard it shortens the overall battery life?
This used to be true for older generation of Li-Ion batteries not the newer ones.
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Old April 20th, 2012, 07:33 AM   #30 (permalink)
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Quote:
Originally Posted by blessing62 View Post
One program was really chewing up the battery so I uninstalled it. Then, voila, the phone cooled off and the battery has lasted all day with a lot of use. Hooray.
This is indeed the problem, a rogue application that loops and drains battery. But may I ask how were you able to snipe the very same app that was causing the trouble?
I can see no way to identify it for sure.
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Old April 20th, 2012, 11:29 PM   #31 (permalink)
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Look at the battery statistics is one. Its under settings/about phone/battery

Or use BetterBatteryStats to look at what's (processes) causing wakelogs.
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Old April 21st, 2012, 12:52 AM   #32 (permalink)
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You can export the log from Better battery stats and analyze it properly.
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Old April 21st, 2012, 03:46 AM   #33 (permalink)
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I too am getting about half the battery life since upgrading to ICS. Battery info shows 80% of usage is Android OS.

CPU total = 8h 23m
Keep Awake = 5h 49m

does this suggest something is keeping it awake?
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Old April 25th, 2012, 05:15 PM   #34 (permalink)
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Really struggling to find a solution to my problems. Updated my phone through Kies to 4.0.3. now I get an error message every 30 seconds saying battery paused voltage too high. Tried new battery, tried charging 100% then taking out battery, downgrading firmware, rerooting, restoring factory settings even cleaning out the usb port. When connected to a pc this only charges the phone, only connects through Odin. When i take out usb or normal charger the battery icon on my phone shows that it is still charging up to 5 mins after disconnecting. Also battery can appear to be at 15% to 100% no matter how long the phones been charging. Please help if anyone can because im close to throwing the thing up the wall. I dont class myself to be a noob with this kinda thing but this has me stumped!!
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Old April 26th, 2012, 02:33 AM   #35 (permalink)
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this tips might help
[TIPS][GB & ICS] Battery Saving TIPS Collectionô (ICS added!) - xda-developers
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Old April 26th, 2012, 05:26 AM   #36 (permalink)
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Hi,

had the same problem, the galaxy was constantly hot and battery didnt really charge.

I uninstalled my mobile security. works fine now
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Old April 26th, 2012, 08:07 AM   #37 (permalink)
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Hello

I have the same problem here.
I updated my android and now my battery is empty in 8 hours (2000 mAh).
At my better battery stats I have the most problems at the following subjects:

Wakelocks
=========
MAIL_SERVICE (com.android.exchange.Exchange Services): 2 h 43 s (7243 s) Count:1921 29,1%
FacebookService (com.facebook.katana.Facebook): 4 m 1 s (241 s) Count:12 1,0%
*sync*_gmail-ls_Account {name=jarcodejonge@gmail.com, type=com.google} (com.google.android.gm.Gmail): 3 m 35 s (215 s) Count:51 0,9%


Kernel Wakelocks
================
"multipdp" (): 3 h 24 m 6 s (12246 s) Cntc/wc/ec)1241/0/1240 48,8%
"secril_fd-interface" (): 2 h 13 m 5 s (7985 s) Cntc/wc/ec)2931/0/0 31,8%
"PowerManagerService" (): 2 h 4 m 44 s (7484 s) Cntc/wc/ec)5327/0/0 30,1%
"l2_hsic" (): 51 m 47 s (3107 s) Cntc/wc/ec)10756/0/0 12,4%


can anybody tell me what the problem is?
as exchangeservices I use gmail (4 till 5 mails a day)
and I use my work mail, that works with the usual email program from samsung (Email) we are working with outlook mail (20 mails a day).

It was never a problem with version 2.3 till 2.6
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Old April 27th, 2012, 04:33 AM   #38 (permalink)
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Hi - Newbie here!

I received a GS2 last week from CPW (Orange contract) and was very happy with it on 2.3.4. Plugged into Kies and updated to 4.0.3 last night and geeze Ė what a disaster. Why have they removed such good, basic functionality from so many things (eg: can't get into contracts from the phone menu)? And what's with the new android smilies - they're hideous! Iím not one to customise much so this has really affected my use of the phone, not to mention the battery drain problems other people have mentioned. Needless to say - I hadn't done any reserach on the update beforehand!

This morning Iíve spoken with CPW (3 stores Ė no help), Orange Tech (no help Ė told me to phone Samsung), Samsung Tech who advised there was no way to revert to 2.3.4 but that the battery drain issue would only be fixed if I sent it in for repair. According to the Samsung advisor this is a known hardware issue with some phones following the update. Nice!

Anyhow, I want to ďrollbackĒ to 2.3.4 so Iíve found my way to XDA and I understand I can flash my phone using Odin and the relevant official firmware (in my case the XWLP7 CPW version). This is all very daunting for me and Iím worried about messing my phone up and voiding the warranty. So here are my questions (sorry if these are really dumb but I have spent hours now trawling for answers and still not sure Iíve understood everything! Ö)

Q1: If I follow the instructions using the XWLP7 download am I correct in thinking this flash will reinstall 2.3.4 on my phone and put it back to the stock state it arrived in?

Q2: If yes, do I then need to do anything else? Iím a bit confused about the advice on rooting and the SuperOneClick. Is this something I need to do for my phone to work after the flash? I don't want a rooted phone as I know this voids the warranty I don't intend to customise it.

Q3: And finally Ė does anyone know if running this flash is going to void my warranty or will it just look like the original stock phone once done if I have to send it in for repair? Would they be able to tell it's been flashed? Being a CPW phone itís unbranded and didnít appear to have any network specific SW on it at the start.

Any advice gratefully received! ;o)
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Old April 30th, 2012, 10:04 AM   #39 (permalink)
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Quote:
Originally Posted by Rheumatoid View Post
I too am getting about half the battery life since upgrading to ICS. Battery info shows 80% of usage is Android OS.

CPU total = 8h 23m
Keep Awake = 5h 49m

does this suggest something is keeping it awake?

Same as me, heres a screen shot

I have rebooted, nothins seems to work, why is the Android OS so high?
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File Type: png Screenshot_2012-04-30-13-42-04.png (51.7 KB, 50 views)
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Old April 30th, 2012, 11:49 PM   #40 (permalink)
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Confused

Common problem. Anyone found the solution?

My Android OS was at 51% plugged into usb charging and the battery was dying faster then it could charge!

Just tried a few of those suggested tips on the XDA forums, reset the phone also and now my battery is charging normally and is already at 31% from 14% in about half an hour.

Something is stuffing up with the Android OS battery usage but what?
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Old May 8th, 2012, 01:34 PM   #41 (permalink)
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Quote:
Originally Posted by sguigglydoo200 View Post
Really struggling to find a solution to my problems. Updated my phone through Kies to 4.0.3. now I get an error message every 30 seconds saying battery paused voltage too high. Tried new battery, tried charging 100% then taking out battery, downgrading firmware, rerooting, restoring factory settings even cleaning out the usb port. When connected to a pc this only charges the phone, only connects through Odin. When i take out usb or normal charger the battery icon on my phone shows that it is still charging up to 5 mins after disconnecting. Also battery can appear to be at 15% to 100% no matter how long the phones been charging. Please help if anyone can because im close to throwing the thing up the wall. I dont class myself to be a noob with this kinda thing but this has me stumped!!
I had this issue with GB still on my s2, only a month after owning the phone. There's quite a few threads on this issue online. You need to clean the USB port and lift the pin up towards the screen lightly to remedy the problem, in the short term at least anyway. Failing that you need a new USB PCB fitted in the device. I'm to scared to send my phone back to Sammy to sort the issues out as most people that did got their phones returned and their warranty voided for moisture damage to the USB's PCB. The good news is the part is cheap and easy to replace, if that's any consolation?

Some Sammy dealers have apparently told an XDA forum member that they are aware of the issue but they are refusing to recognise the problem. Apparently a batch of S2's left the factory without sufficient anti-oxidizing coating on the small USB PCB's or something like that? I can't confirm this obviously. Enough people seem to be having this issue. If your voice commend app ever starts to start up on its own, then you can be pretty sure you have this issue with the PCB part.

I'm sim free and I recently upgraded to ICS and my phone now takes all day pretty much to charge ( form around 12pm to 8/9pm its at 88% then I admit defeat taking it off the charger) You could fry an egg off it while it is charging. By morning I'm down to 30% even after leaving the phone in aeroplane mode all night to conserve power. The phones pretty much useless to me now as it will never charge in time for work. I've removed almost every app I can and disabled a lot of stuff I don't use. The OS itself in battery stats is the one that seems to be munching most of the juice? Kind of had enough of this phone now and I've only had it for nearly 3 months at most.
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Old May 8th, 2012, 02:30 PM   #42 (permalink)
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Default Bit better today actually..

Had the day off work today. I left the phone this morning after the alarm went off in aeroplane mode till about 1.30ish this afternoon. It was at the usual 30%ish area that its been at most mornings since the ICS update. Put it on charge at 1.30pm and it finally reached 100% by 7pm.

Still sucks at 5 and a half hours, but at least its an improvement of sorts to the usual 8/9 hours I've been usually having to let the phone cook all day at.
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Old May 8th, 2012, 03:06 PM   #43 (permalink)
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Hi All
green (ever green) here and I hope you can help me.
I've upgrade my SII intl. version in the weekend via wireless update (not Kies) and had the following issues:
1. same issue with Exchange email as reported above by Chri5H. The Exchange service the Exchange server has stopped working well and updates the emails every day till 12 PM and than stopped till the next day. I've checked the setting, the sync period etc - nothing. I tires to recreate the account - same issue
Any advice?

2. can connect to Wifi - have sevral networks I link to and all are showing as "obtaining IP..." and are not being connected. tries to re connect and enter the passwords but still the same problem

for now to battery issues but we will see...

thanks
Mrs. ozio
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Old May 9th, 2012, 04:08 PM   #44 (permalink)
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Thought I'd share my success story here. Thanks to the XDA Forum I've at last managed to roll back my unbranded CPW SG2 from ICS to GB 2.3.4 which was what it was shipped with. I orignally used the suggested firmware on the main XDA guide for flashing, but the official release version is also ICS 4.0.3 so that didn't help much. I then had to find older versions of firmware on samfirmware. After a disaster using a 2.3.6 UK orange version (as I'm on orange but forgot that this would "organify" my phone!) I eventually went for 2.3.4 for UK / Ireland and that has done the trick. I was very worried about using a firmware that didn't match up to the original PDA of my phone, but at least I've got a functional handset now and if I ever need to send it in for repair under warranty I hope I can just hook it up to Kies and re-load the ICS again for my original PDA.

Anyway - hope this helps anyone who is a total novice like me, and wants to rollback from ICS to GB 2.3.X.
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Old May 9th, 2012, 06:51 PM   #45 (permalink)
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I had battery issues after switching to ics. It got a bit better after a few days.

But then I switched my email program from the stock to another (k9) and my battery life is 24 hours now.



Sent from my GT-I9100 using Tapatalk
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Old May 10th, 2012, 04:08 PM   #46 (permalink)
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This morning s2 seemed to be OK again, it only took a few hours to charge as per normal and it stayed nice and cool in the process.

Stuck my phone back on the charger when I get in today around 6pm, and its still charging now after 4 hours. My phones only got a few apps on it at the moment and battery stats don't give me any new clues? I disabled the email exchange programs as I only use gmail or login to accounts via the web browser. I think I'm going to send mine back to Sammy if they don't get out any stability updates out soon.
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Old May 14th, 2012, 05:27 PM   #47 (permalink)
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Default Battery killing email app on 1of2 SG2s after ICS upgrade

Hi,

New member here.
I've been reading this thread with interest as both me and my wife have the SG2 with Orange UK contract. I upgraded both a couple of weeks ago to ICS and while I've had absolutely no issues with mine, my wife's battery life is really poor.
Checking the battery usage, the stock email app uses around 23% of the battery whereas on mine it doesn't even register. The exchange services usage is also higher on hers.
This makes absolute no sense as she only has gmail and hotmail via exchange set up in hers whereas I have four accounts with two exchange emails, so I'd expect mine to have the battery drain.
Suggests to me buggy Samsung email app.

Anyone been able to solve this?

Many thanks
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Old May 31st, 2012, 05:27 AM   #48 (permalink)
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Post S2 help

Go into Settings/Accounts and Sync and uncheck Background Data to stop the client constantly sending data packets to the server when the phone is idle. There seems to be a bug in the client side of a mail program. This can of course cause slight inconvenience for some programs so another maybe more user friendly option is to to download Juice Defender which will stop data usage when the phone is idle. Hope this helps
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Old June 1st, 2012, 01:33 AM   #49 (permalink)
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yep true. battery life has taken a big hit after the ICS update. takes like 3.5-4 hrs to full charge now. and sometimes, even the charge drops while charging through AC. wat a waste.
in GB it used to be around 2.5 hrs for a full charge. and obviously lasts lesser now. plus the increased heat on the device while charging. the used RAM in the task manager also seems to be much higher now in ICS. wonder its got any effect too on the battery.
anyways something needs to be done by SAMSUNG on the next update and soon.
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Old June 3rd, 2012, 03:24 AM   #50 (permalink)
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Default Android 4.0.3 upgrade via KIES

Johannesburg, South Africa. Android upgraded via Wi-Fi. Phone performance was noticeable improved at first, but then started having problems with battery needed to be recharged; system freezing and only rebootable on removal of battery and then applications have to be re-registered randomly e.g. Kindle. email was working fine before, but problems now on push email. And then Opera Mobile installed as default Internet. Sorry I am a senior wannabe Technophob, so maybe this has been addressed before, but I am stumped. I love the phone and don't want to knock it - so hopefully there is a 'patch' to fix this. Thanks for your patience!
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