As far as I can remember, at that time is to undervolt wifi component, I saw this on "Phenomenal" kernel.I remember we are able on some Chinese tablets to change power consumption of Wifi component. I'll check this out if I have some time, but it might be interesting to do so on SG2
Be careful about Phone apk, should NOT be removed since it's critical one (cf. here at line "Phone.apk"), I don't recommand this at all.Also, if some extra-terrestrial people are using Galaxy S2 without any cellphone providing (no SIM, etc... only using Wifi/Bluetooth), you will gain hours by deleting/renaming phone.apk.
Don't do this if you use cellphone providing ! You'll lose phone (I don't know if you keep VoIP function), cellular data, etc etc.
I can remember using smartass (the first version) on my sold galaxy tab first gen (which I enjoyed pretty much btw ) it really was a nice gov, which saved me a lot of battery, but governor's depends highly of each devices, here also we cannot say there is one governor to govern them all , as always it depends of each people, their needs, etc. I tested smartassv2 and was dissapointed by it surely because of Siyah's kernel. That's why I don't use it anymore, this kernel drains a lot of battery, generally speaking. At that time the best kernel I should recommand is NEAK 1.4x, with every options to save battery enabled since you will not lost any performance thought. Would be nice to see smartassv2 gov into NEAK one day (starved to test).Also, dunno if it's already stated by AndroidGX or somewhere else in the post, but it's interesting on some roms to use Smartassv2 profile (ie on CM7.1) and create SetCPU profile for screen off 100Mhz min - 200 MHz max (on underclocked kernels, like Siyahahahahah)
Be careful about Phone apk, should NOT be removed since it's critical one (cf. here at line "Phone.apk"), I don't recommand this at all.
+1, it should not be removed (especially on Samsung roms, it is probably linked with TouchWiz). On my father's tablet (a Chinese MID 7" 799ca) you can remove phone.apk : causes no problem (!) and heavily enhance battery.
I suppose so you *might* remove it from any vanilla rom (no rom with overlay UI, it will make framework.jar crazy lol), but the main idea remains the same : phone functionnality (phone, data...) is one of the most draining stuff on our devices.
As AndroidGX said, if some newbie read this : do not remove phone.apk, ESPECIALLY if you don't know what you're doing. This is for testers/devs and suicide people. It will make you gain lots of baterry at the cost of misc FC and... woops I can't phone anymore with my phone
Miscellaneous
[Q] You claim you cannot increase battery life using UV beyond 2%. Justify yourself!
[A] When the processor is in use (i.e. not asleep or idle) UV does save a tiny amount of power. I tested with the most extreme UV my phone could handle. With a high performance governor, e.g. smartassv2, extreme UV would reduce CPU drain by 13%, or about 7 mA. With a governor that keeps the CPU frequency low, CPU drain would be reduced by about 18%, or 4.6 mA (weighted - see the spreadsheet starting cell H88).
Remember, these savings are limited to the processor, and only when it is active. For most users, this will mean the screen is on. For comparison, the screen on minimum brightness displaying black uses 9mA. On max brightness, displaying white, it uses 690mA. Let us assume some median value, ~350 mA.
A saving of 4.6 mA out of at least 350 mA (screen) plus 20 mA (CPU)
= 1.2%
A saving of 7 mA out of at least 350 mA (screen) plus 50 mA (CPU)
= 1.8%
So, regardless of your choice of governor, even with extreme undervolting, you are not going to be able to increase your battery life by more than 2%.
Ok..lets discuss the advantages of UV..will us??
http://xdaforums.com/newreply.php?do=newreply&p=22126846
Do you agree that UV will give more battery juice??
THREAD NAVIGATION :
- Gingerbread PART (Android 2.3.x)
- Ice Cream Sandwitch PART (Android 4.0.3)
- Common PARTS
Well, this information is not correct. See here: http://xdaforums.com/showthread.php?t=1124669
better battery stats .
http://xdaforums.com/showthread.php?t=1179809
That is now rule one your starting point .
jje