SOLVED
Finally my ARC S is giving execellent battery backup.
Almost double battery backup:smileylaugh:
Please find this thread below
http://forum.xda-developers.com/showthread.php?t=1413262
Please check this thread from XDA.
"
Hello guys
Today i am going to give you a very small tip may you people like it ....
i used 2.3.4_283 firmware in Arc for a long time , after that i flashed 42 firmware and feel that its drain battery fast as compare to 283 firmware either you are using you phone or it is in deep sleep mod
Then i flashed 58 firmware and after that 62 firmware but battery drains still fast
then i try one thing on my arc i get the Kernel from 283 firmware and flashed it on all three version of firmwares ( 42, 58, 62 ) and notice that the issue of fast battery drain is solved it is only because of 283 kernel "
now i am using 42 firmware with baseband 64 and kernel from 283 firmware
It does'n matter what ever the firmware you are using or what ever the baseband you are using ....... you need to use kernel from 283 firmware only for low battery drains ..............
i attached kernel from global generic wold 283 firmware also...
How to flash different Kernels
1) connect your phone into fast boot
2) open cmd
3) fastboot devices
(write this command and enter it to check your phone is connected in
fastboot or not)
4) then write this and enter
fastboot flash boot kernel.sin
Done ..........
remember to copy kernel .sin file in that folder from where you are going to launch cmd
=============================================================================================================
I have done this already and my ARC S works completely fine.
This how I have done it
-----------------------------------------------------------------------------
Requirements:
- LT18i_4.0.2.A.0.58(2.3.4)_HK firmware (Download from here)
- The Kernel from .283 (Download the KERNEL here)
- Flash Tool ( Download from here)
- WinZip/Winrar or any other similar software.
Steps
---------------------------------------------------------------------------------------------------------------------------------------------------------
Step 1: Download the LT18i_4.0.2.A.0.58 (2.3.4) _HK firmware
- Unzip the firmware *.ftf file using WinZip or Winrar.
- You will get a folder like this.
Step 2: Download the Kernel file
- Unzip the file
- You will get a file named “Kernel.sin
Step 3: Copy the “Kernel.sin” file
- Paste the file to the firmware (LT18i_4.0.2.A.0.58 (2.3.4) _HK) folder and replace it.
NOW OPEN FLASH TOOL FOLDER. YOU SHOULD SEE FIVE FOLDERS WITHIN IT.
Step 4: Copy the LT18i_4.0.2.A.0.58 (2.3.4) _HK folder
Step 5: Paste the folder within firmwares folder
Step 5: Click on Flash Tool .exe
- Click on Advanced from the menu
- Select bundle creation
Step 6: Click “select source folder” (click on the doted button)
Step 7: Select the folder that you have copied in Flash Tool/ firmwares folder (LT18i_4.0.2.A.0.58 (2.3.4)
Step 8: You will get all the file list on the left side
Step 9: Select all file and click on the “Right Arrow” button.
- All files should be now at right side.
Step 10: Put anything in this 3 boxes (doesn’t really matter)
I have put following
- Device: LT18i
- Version: 0.58_283
- Branding: Stock SE
Step 11: Click OK and wait.
Step 12: When you will see the "Finished bundle creation" message, then the firmware is ready.
Step 13: Check the Flash Tool/firmwares folder. You should get your new firmware “LT18i_0.58_283_Stock SE.ftf” file there.
IF you DO, then just flash your device with this firmware.
All done.
**Important**:
- I am not responsible if anything goes wrong, so proceed carefully, do not miss any step.
- I have tested this kernel combination with both 0.42 & 0.58 firmware and it works fine in ARC S.
- 0.62 firmware (didn’t worked for me)
- You can easily root this firmware using the zergRush method.
Message was edited by: Auni
Results after using the Kernel
- This is what i got after 16 hours of use, 20% of battery left.
- App used, Video player, Pdf Reader, Asphalt 6 HD, Quick Office, Market, Music and few more.
***The most IMPORTANT thing is, that the display was on for 5 hours @ 35-40% brightness level. This is a gain for me, With the earlier kernel, i used to get maximum 3hours of display time, with the same amount brightness level set.***
Another Benchmark is here. Please find this thread.
http://talk.sonyericsson.com/thread/28996
In this thread I have tested ARC S HD video playback capability. And the result was 300 mins playback with fully charged battery.
Now, with the new kernel, ARC S gave me 354 mins of HD video playback.:smileyhappy:
That's another good find for me.
Still results may be not same for all. Actually I am getting better battery back up, so I shared.
** My Kernel is also the same, even after i tried the above process. But as I mentioned above, that i am seeing changes in battery life.
*** Model No. LT18i to LT15i should not be changed if you do the process correctly. 
This is the screenshots of my device
Did u downloaded the 0.58 firmware from the above given source, then it should work fine. Atleast it worked fine for me.
Ok, I same you(Model LT18i:smileyhappy:) but when i press *#*#7378423#*#* and check Software info
that's picture ..........
Phone Software Version 4.0.1.A.0.283
File System 4.0.2.A.0.5.8
but i receive notification bar for Update Software new version(:smileyconfused: i try to connect PC Companion on my computer then it's same result software want to update) i think about Phone Software Version is old? Yes or No? if you say yes, i ask to Close notification update? but You say No ,then What should i do:smileyconfused:? i should Update Software on Sony Ericsson PC Companion 2.0,right? and the last question i suspect "Kernel version" = "Phone Software Version",right ?
Thank you very much
Roller
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