HowTo: maximizing battery life from Samsung S2 with Dorimanx-Kernel

1.) “Tweak your display settings”

• try lowering the brightness of your phone (turn off automatic brightness as well)
• reduce the time until the screen turns off when not in use
• use a dark wallpaper (theme, bgoog.com, etc.)
• disable animated wallpaper

Tip: you can see in settings -> battery -> how much battery-power your screen/apps consumed

2.) “Turn off wireless services you don’t need”

• do you really need Bluetooth, WiFi, GPS, 3G and more -> turning off some of these when you don’t need them

Tip: you can quickly toggle these settings on/off by using Android’s built-in power widget or use a app from market for that

3.) “Tone down data usage”

• use only 2G networks -> 2G networks are noticeably slower than 3G, but 3G uses more power
• try to use WiFi whenever possible instead of 3G as well
• disable global autosync (background update from App like facebook, twitter etc.)
• disable app autosync (some apps have their own sync schedule, so take a look at the settings from your apps and don’t install to much apps)
• less frequently autosync (if a app e.g. email-app need background-sync, then use less frequently autosync
• put your phone on “airplane mode” when you are not using it e.g. at a meeting

4.) “Don’t use much [background] apps (widgets)”

• try e.g. “OS Monitor”-App to see how much resources your running Apps consume! (CPU usage = battery usage)
• try e.g. “Autorun Manager”-App to prevent some auto-starts
• disable home screen widgets that are pulling data from the web & you don’t need
• do not leave applications running when you don’t need them
• uninstall total unused apps

5.) “Don’t use task killers (in the most cases)”

• the System will kill Apps automatically you don’t need a Task-Killer-App … some of this Apps consume even more power because those apps usually start themselves up again right after you kill them and so they need cpu & drain power again …
• activate “close app when back button is pressed” in the settings (only CM?)

6.) “Automate your power conservation”

• easy to use: Juice Defender
• most customizable: Tasker

Note: this Apps also running in background and need battery-power, so if you use “power widget” manually you maybe don’t need such Apps

7.) “change Kernel & root-settings”

7.1) battery-profile

• use the battery-profile (you can switch it via recovery)
• … or use the “extrem battery profile” (you can switch it via “ExTweaks”-App -> BACKUP/RESTORE
• you can also use (extra)-battery-settings via “ExTweaks”-App -> CORTEXBRAIN

7.2) general-info

• disable Ads via hosts-file (disable loading of images etc. on website & in apps) via “ExTweaks”-App -> BACKUP/RESTORE
• if you don’t need more free memory -> don’t use zram -> compress / decompress memory in memory (more cpu usage = more battery usage) can be set  via “ExTweaks”-App -> MISC -> “ZRAM SETTINGS”
• disable BLN (Back Light Notification) via “ExTweaks”-App -> “BLN”
• disable “led-on-touch” (reduce led voltage level) via“ExTweaks”-App -> “BLN”

7.3) CPU

• use e.g. “conservative” (+ extra settings) as CPU-Governor via “ExTweaks”-App and check the effect e.g. with “SetCPU”-App
• use e.g. “CPU Spy”-App to see how long the cpu usage it’s frequencies (+deep sleep)
• reduce (max.) cpu speed via “ExTweaks”-App -> “CPU”
• reduce “touch screen lock cpu-frequency” via “ExTweaks”-App -> “SCREEN” -> “TOUCH SCREEN LOCK FREQ”
• use cpu undervolting (can cause SOD) via “ExTweaks”-App -> “CPU”