C3rd

I had this problem with my iPhone that drains my battery so fast. A 100% down to 10% in 2 hrs. I don't blame my hardware because I believe its not causing the issue. Its something on the running applications because when I touch my iPhone, its warm like there's something processing inside. One of the draining battery applications is the Yahoo! Messenger. But in my case, I don't have Y! Msgr. Since my iPhone was jailbroken, I installed "top" command and enter to iPhone terminal using PUTTY and kill all the apps which are not on the default iPhone services.

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The list below are iPhone process list, you can check them one by one for disable or enable these iPhone Service or not. Launchd: takes over many tasks from cron, xinetd, mach_init, and init, which are UNIX programs that traditionally have handled system initialization, called systems scripts, run startup items, and generally prepared the system for the user. (do not close) TQServer: Net Long Company PC Suit daemon (recommend not to close it) BTServer: Bluetooth Service (BlueTooth) (in my environment with the dock, turn it off iphone not responding) CommCenter: Communications Center (phone system) (do not close) configd: to automatically configure and maintain the network (do not close) cron: regularly scheduled command or script execution (alarm clock might use it, recommend not to close it) mDNSResponder: Multicast-DNS Responder daemon. (Do not turn off) lockdownd: so that iPhone can use other SIM card (do not close) ptpd: the process of connecting itunes (do not close) fitx: WeFIT Input Method (not recommended to be closed) mediaserverd: (system sounds) (do not close) notifyd: inter-process communication (do not close) SpringBoard: Springboard is no better explanation in English, if you used the installer or ibrickr install a third-party software, you will find the middle of the screen there is a circular symbol loader, and then immediately return to the standby screen iPhone , then this is a Springboard restart the process (do not close) MobilePhone: I need not explain this right (do not close) sshd: ssh daemon (you can close it) crashreporterd: test application crashes the daemon. (Recommend to close) dock: dock the software process (you decide to use or not) iapd: ipod is the iphone and other Apple products using a communication protocol, the purpose is to allow other third-party devices such as communication equipment and iphone. (Recommended closure) syslogd: recording system error logs and status messages (recommend to close) update: time to refresh the file system cache to prevent data loss caused by system crash (recommend to close). If you want to manually sync the file system cache, in text mode (ssh to connect to the iphone), implementation of the sync command. crashreporterd, iapd, syslogd, update service can be safely shut down and will not impact on the system. fitx memory for not a lot of information needs to hand in the hair starts, so I do not recommend turning off.

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Processes:  38 total, 1 running, 1 stuck, 36 sleeping... 201 threads                                                                                                                                                                 13:55:28
Load Avg:  1.83,  1.18,  0.99    CPU usage:  4.63% user,  0.00% sys, 95.37% idle
SharedLibs: num =    0, resident =     0 code,     0 data,     0 linkedit.
MemRegions: num =     0, resident =     0 +     0 private,     0 shared.
PhysMem:   57M wired,   96M active,   50M inactive,  291M used,  214M free.
VM: 11G + 0   27721(0) pageins, 0(0) pageouts

  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS  RPRVT  RSHRD  RSIZE  VSIZE
  750 top          2.8%  0:00.09   1    21      0      0      0  1184K+  267M
  746 bash         0.0%  0:00.04   1    16      0      0      0  1060K   268M
  745 sshd         0.1%  0:01.04   1    18      0      0      0  1428K   268M
  691 bash         0.0%  0:00.10   1    16      0      0      0  1088K   268M
  690 sshd         0.0%  0:01.16   1    18      0      0      0  1420K   268M
  395 Bump         0.0%  0:01.21  11    66      0      0      0  9604K   340M
  374 MobileMail   0.0%  0:02.55  10   128      0      0      0  8836K   343M
  309 LINE         0.0%  0:23.51  11   192      0      0      0    42M   413M
  271 MobilePhon   0.0%  0:01.98   5    82      0      0      0  6512K   339M
  210 networkd     0.0%  0:00.52   3    50      0      0      0  1068K   269M
  139 myTunes      0.0%  0:01.18   1    10      0      0      0   372K   277M
  127 notifyd      0.0%  0:03.19   4   115      0      0      0  1028K   270M
   73 aosnotifyd   0.0%  0:00.79   4    70      0      0      0  3504K   297M
   72 BTServer     0.0%  0:00.82   3    62      0      0      0  1992K   271M
   71 CommCenter   0.0%  0:12.08  11   214      0      0      0  3420K   284M
   66 SpringBoar   0.2%  1:43.16  20   555      0      0      0    41M   436M
   65 aggregated   0.0%  0:05.62   4    44      0      0      0  1984K   298M
   64 apsd         0.0%  0:01.62   3    86      0      0      0  1780K   287M
   63 assistivet   0.0%  0:01.30   6    68      0      0      0  6240K   333M
   58 configd      0.0%  0:09.70   9   220      0      0      0  2540K   272M
   55 dataaccess   0.0%  0:21.93  11   127      0      0      0  8092K   304M
   54 fairplayd.   0.0%  0:01.84   2    62      0      0      0  3568K   277M
   53 fseventsd    0.0%  0:02.03   4    25      0      0      0   988K   268M
   51 iapd         0.0%  0:01.73   4    94      0      0      0  3348K   289M
   50 imagent      0.0%  0:02.17   4    89      0      0      0  2392K   298M
   48 locationd    0.1%  1:18.24  13   182      0      0      0  7644K   307M
   47 mDNSRespon   0.0%  0:01.51   3    46      0      0      0  1488K   269M
   46 mediaremot   0.0%  0:00.30   3    48      0      0      0  1576K   269M
   45 mediaserve   0.0%  0:04.15  17   265      0      0      0  7160K   304M
   39 lockdownd    0.0%  0:08.90   2    63      0      0      0  2268K   288M
   32 powerd       0.0%  0:08.65   3    62+     0      0      0  1052K+  287M+
   30 syslogd      0.0%  0:01.36   4    58      0      0      0   628K   268M
   26 wifid        0.0%  0:08.63   4   106      0      0      0  2064K   288M
   25 sbsettings   0.0%  0:00.20   2    28      0      0      0  2308K   287M
   24 callblocke   0.0%  0:00.59   2    33      0      0      0  2860K   296M
   22 myTunes      0.0%  0:00.01   1    16      0      0      0   332K   258M
   21 UserEventA   0.0%  0:19.29   9   147      0      0      0  2756K   291M
    1 launchd      0.0%  0:04.99   3   292      0      0      0  1016K   268M

--- Reference: http://blog.iobit.com/iphone-process-list_4008.html

Today, I just jailbreak my iPhone4 with a firmware of 4.3.2. I use this as a guides;

1. Jailbreak procedure - http://www.youtube.com/watch?v=NoIi6tLN2gs
2. Jailbreak Failure when turn to recovery mode - http://jaxov.com/2010/05/recboot-iphone-recovery-mode/
3. And I am using redsnow latest release (redsn0w 0.9.6rc16) - http://blog.iphone-dev.org/
4. for firmware downloads -- http://www.felixbruns.de/iPod/firmware/

Note: using redsn0w 0.9.6rc16, you only need to perform once the DFU mode.