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HomeClockworkMod (CWM) Recovery easy install for RK3066 and RK3188 -- TWRP/CWM Flash-Tool and root for RK3288
 Please donate to support OMA and CrewRKTablets firmware work, thank you !
Contributor
2013/04/23
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For those with expert eyes, below are some screenshots from Wakelock Detector which shows what has been going on during standly (mostly). Perhaps someone can interpret this data to detect where exactly the problem is with battery drain?
PS: I also downloaded an app called Greenify which I used to hibernate some apps (see the greenify screenshot below) - this has resulted in a noticeable decrease in battery drain - but it is still too much.
Darth Jabba, the Dark Jedi from Nal Hutta
2013/12/16
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I've also installed Greenify, which only gave me a placebo effect, nothing else.
All kind of other battery tools also didn't give me any clues to what is going on.
Everything seems normal...
Contributor
2013/04/23
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Mine doesn't look like a placebo effect - but perhaps it is!
Darth Jabba, the Dark Jedi from Nal Hutta
Contributor
2013/04/23
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Breakthrough! There is clearly some telephone stuff going on somewhere, although I can't detect which app is responsible for it. Turn off the tablet's "ringer" (i.e., take it into silent mode), and the standby battery life increases dramatically. See the attached screenshot.
There are all sorts of free "silent mode" apps in the play store. I use an app called "Quick Settings" (there are many of them - I am talking about the one written by Sergej Shafarenka) to turn off the ringer. It possibly turns off all the other sounds as well, so you might have to switch it back on when you need sound.
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Burs, Ohamn, maikal, UznamerDarth Jabba, the Dark Jedi from Nal Hutta
2013/12/16
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Thanks. I've set that up right now, and will post the results.
But I turned all sounds off with an option from the power menu button. Should have the same effect.
I don't like having more than one app which is doing the same thing. Especialy if it's built-in rom.
Contributor
2013/04/23
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I don't think it's just about turning off all sounds. It's about disabling the ringer. I doubt that simply turning of all sounds will work - but it is worthy trying.
Darth Jabba, the Dark Jedi from Nal Hutta
2013/12/16
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You can also set your ringer off with Xposed GravityBox module. But it's useful to have it for many many other things too as you might already know. What I want to say is, then you set your ringer to off, there is a message "sounds are off" on the power menu too. And if you try to enable the sounds again from the power menu, the ringer is also set to on. So I would say those options are interconnected and basicaly means the same thing. Ofcourse, if I won't see any change regarding battery autonomy, I will try installing the app you suggested. Stay tuned 
2013/12/16
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No luck for me afterall. In 10,5 hours overnight it lost 15% with WiFi off. Now I installed QuickSettings and turned ringer off in that app. But I didn't found that Sergej guy you were mentioning? The app I installed is developed by Halfbit. Hope it's the same. Will see how that one works. You still get the same results?
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maikal
2013/06/15
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CAUTION
I think that this kasty 4.4.2 rom should be dangerous for the cube
"my tablet was charging, I am playing apks on it charge level about 95%
suddenly I eard a clickÂ
the charge level shut down at 5%
the charge restart"
in stand by mode the drain is near 0%
it's impossible to go down to 4.2.2
I hope a final 4.4.2 the actual 4.4.2 kasty is not a test version it's an amateur versionÂ
I HOPE and PRAY
2013/12/16
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What makes you so sure it's the ROM fault? Could it be your tablet maybe?
I don't have such problems, except stand-by battery drain (which you don't have; lucky you).
Back to QuickSettings subject: ringer off is set for the last 2,5 hours. 2% drop. A little bit better. But maybe it was discharging faster overnight because it was fully charged last night, so it drains faster when full?
@JB: can you please post the exact link for the app you use? I can't find it on Play Store. Thanks.
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validatus2013/06/15
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@burs
I think that battery control is erratic
What about a battery (batteries 2) wich are charged & charged & ...
It's physically impossible for a battery to shut down from 95% to 5%
I think that drain discharge go faster and faster when level goes down
 discharge is not linear but inverse exponential
and 4.4.2 seems to run correct on C4
regards
2013/12/16
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As I said, I don't have such severe problems. Yes the battery discharges fast on my end, but it's linear, and far from erratic. In your case when it drops so much and so fast, it must be a sensor glitch or something software related. Or, some battery cells are defective, which I hope is not the case. But we all should know that this firmware is still a beta one, so I'm sure we'll have more pleasant experience when it's finaly done. Today I will play a little bit more with this ringer thingy, but I think I'll have to switch it off when not using it for more than couple of hours. I think that's an acceptable "workaround" until final version comes out.
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validatus
Contributor
2013/04/23
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Burs said
No luck for me afterall. In 10,5 hours overnight it lost 15% with WiFi off. Now I installed QuickSettings and turned ringer off in that app. But I didn't found that Sergej guy you were mentioning? The app I installed is developed by Halfbit. Hope it's the same. Will see how that one works. You still get the same results?
It's the same app. I just changed the overclocked kernel from T13 (with which I did the last test) to T14, and I am looking to see whether there will be a similar outcome. Also, I am doing mine in conjunction with Greenify (which I actually think is effective).
Darth Jabba, the Dark Jedi from Nal Hutta
2013/12/16
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Well, now I don't see a point to what I'm doing all the time, since we don't have the same test scenario?!
You're using T13, and the overclocked one which you uploaded before was T14, right? I'm using that one!
Anyways, I turned off synching and location in addition the the ringer, and now it drains 0,5% per hour. Looks promising. If only it could stay like that, I would look no further than that. I guess I'll have to leave it on for one more night to get more precise results.
Contributor
2013/04/23
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TBH, I don't think there's that much difference between T13 and T14 (if anything, T14 should be more battery efficient). Both are overclocked to the same 1.8ghz cpu and 768mhz gpu. Only a couple of intervals between the lowest and highest cpu speeds differ. I would be surprised if I saw any significant difference - but that is the purpose of testing. I only tried T13 because I wanted to confirm whether or not the heat dissipation was significantly better than T14.
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