[HELP]Samsung Galaxy S2 battery drains too fast after JB update! - Galaxy S II Q&A, Help & Troubleshooting

My SGS2 battey doesn't lasts only 8 hours in stand by with no WI-FI or 3G activted. It drains in 8 hours just standing on a table... It drains even faster when data connetion or WI-FI is activated!
All this happens after I upgraded to Jelly Bean from ICS...
My phone was and is always on stock rom and stock kernel. It isn't rooted...
My softwere version: 4.1.2
Kernel version: 3.0.3.1-889555
Device: Samsung Galaxy S2 GT-I9100.
Please someone help!

alemad said:
My SGS2 battey doesn't lasts only 8 hours in stand by with no WI-FI or 3G activted. It drains in 8 hours just standing on a table... It drains even faster when data connetion or WI-FI is activated!
All this happens after I upgraded to Jelly Bean from ICS...
My phone was and is always on stock rom and stock kernel. It isn't rooted...
My softwere version: 4.1.2
Kernel version: 3.0.3.1-889555
Device: Samsung Galaxy S2 GT-I9100.
Please someone help!
Click to expand...
Click to collapse
Its normal to have high battery drain for a day or two after updating firmware. Have you done a factory reset after updating to JB? If not, please do so now. :good:

Flash Apolo Kernel 4.9 Regular or Extreme v0

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anurag_cancerian said:
HI,
I have updated Jelly Bean 4.3 update on my Samsung Galaxy Note 2 and since I am facing issue battery drain issue. I have not downloaded any application which can take more battery but still phone is running slow and battery drained frequently.
Secondly, I have tried to uninstall Hangouts to get Gtalk back but still I am not getting option to get it back.
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Click to expand...
Click to collapse
Google changed the name of gtalk to Hangouts so there is no going back on that app. Also 4.1.2 android has a wifi issue on some note 2`s. Is the 4.3 rom you have custom IE Cyanogenmodand such? 4.3 was just released for Note 2 (L900) It can be updated at Samsung experience booth at Best Buy.
N9IXW said:
Google changed the name of gtalk to Hangouts so there is no going back on that app. Also 4.1.2 android has a wifi issue on some note 2`s. Is the 4.3 rom you have custom IE Cyanogenmodand such? 4.3 was just released for Note 2 (L900) It can be updated at Samsung experience booth at Best Buy.
Click to expand...
Click to collapse
I have updated my galaxy note 2 from Samsung Kies and even after factory reset old Jelly Bean 4.1.2 did not come up. Could you please tell me if there is any patch which can solve battery drain issue in Jelly Bean 4.3.

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