Battery drain a bit weird? - Galaxy S II Q&A, Help & Troubleshooting

So since I can't get a hold of my phone right now, I'll explain with an illustration done in Photoshop
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My battery graph goes a bit like this.
As you can see, the first green segment is the normal drain rate while my phone is in deep sleep. Say, if I restart the phone, and just leave it to sleep without touching it, the graph would go down at this rate. This rate is pretty good for me, usually a 1% can last 4 hours.
The blue segment is the drain rate while browsing with wifi. The drawing is only an approximate illustration, but needless to say this drain rate is much faster than the green drain rate. I can get 5 hours with wifi browsing, with equates to 1% every 3 minutes. It's not too bad I think.
The problem here is, after browsing (or doing anything) over wifi, the battery curve would go weird. When I'm done with browsing, I always turn wifi off. What I would expect was that the battery curve would immediately return to the normal deep sleep drain - the green line. And yes it should, because as CPUSpy shows, the phone deep sleeps perfectly. But the graph, instead, shows something of a "transition" curve - the red one as shown in the illustration. The drain in this period isn't as fast as the wifi rate (blue), but it is faster than than normal deep sleep drain (green). Only after some time will it return to the green rate.
So...what is causing that red curve?

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Did you check for wakelocks using betterbatterystats?
Sent from my GT-I9100 using xda app-developers app

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Spiralzz said:
Did you check for wakelocks using betterbatterystats?
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
Yes I did, but I thought having a wakelock would take away from deep sleep time? I usually wipe my CPUSpy stats and leave the phone to sleep for an hour, it would almost always come up as 99% deep sleep. But anyway, I did check again, and RILJ was at the top of partial wakelocks, at 16 mins after 16h. It isn't seem to be adding time though.

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Why two threads within half an hour ? They're essentially about the same thing. You could easily have edited your OP and/or title in the thread you created ~26 mins before this one :-/

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nyancatland said:
Yes I did, but I thought having a wakelock would take away from deep sleep time? I usually wipe my CPUSpy stats and leave the phone to sleep for an hour, it would almost always come up as 99% deep sleep. But anyway, I did check again, and RILJ was at the top of partial wakelocks, at 16 mins after 16h. It isn't seem to be adding time though.
Click to expand...
Click to collapse
Dunno why CPUspy is reporting wrong, but the rilj wakelock was for long, hence the battery drained more. If you're looking for a solution, what I've read to solve that wakelock is to turn airplane mode, switch off mobile, switch it on and then turn airplane mode off....
Sent from my GT-I9100 using xda app-developers app