Nixdorf, check your battery usage.
See what apps causing it.

Also list down things like
ROM
Kernel
Modem
this may help us better identify the problem.

any ahem apps installed? do you leave wifi/3g on the whole time?

what "ahem" apps?

Even with wifi and 3G on all the time, it shouldn't drop 69% overnight.

@nixdorf

Your phone is the 9100G, not the original S2.

So I won't have much experience.

But the modem can be found
Setting -> about phone -> baseband version

ROM
Setting -> about phone -> Build number / android version

Kernel version, besides any numbers do you see anything else?

Is everything stock? If so, then need to seek help from other 9100G users.

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Added on January 27, 2012, 10:15 amBtw, have you tried rebooting your phone?

ahem apps  = pirated apps
probably due to his frequent usage of app killers too?

Technically yes, AMOLED would be a lot more power efficient than S-LCD...

You lost 70% battery life overnight?

What was your phone doing overnight?

Wifi/3g on?
Email/accounts auto sync?
Too many active apps running?
GPS on?
Bluetooth?

Come post your screenshot.. as I can't believe it

Holy crap, that is a lot of wakelocks, install BBS and use your phone normally for one day, than you will know what is causing your battery drain

i never off my data
all my apps sync every 15 minutes
my brightness is at max
gps on
max drain of my battery overnight didnt pass 30%
we need the battery better stats
its free from xda

http://forum.xda-developers.com/showthread.php?t=1179809

download it n show us

everyone ask u post betterbatterystats screenshot, you come and post this stupid screenshot 
u dl one and see, you'll see its a cwm flashable file

What version is your google maps? Go to maps, settings, about

I have latitude perpetually on, but doubt I drain as much as what he says he was draining. I know they apparently improved batt life on 6.1.0 onwards. Wanted to see what version he's using.

But yea, network location wise draining a truck load for him

@nicregi : I see what you mean by the CWM having more intuitive interface, nice. Especially useful when flashing loadsa addons from thunderbolt

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Added on January 27, 2012, 1:07 pm

Either :

1. Sign out of latitude as suggested
2. Upload your google maps, let it run a while with latitude, and report back if got improvement

Ah didn't know this, luckily mine ok. Before flashing any more addons I better check 

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Added on January 27, 2012, 1:13 pm

Must sign out of latitude under the latitude menu baru off one. You exit maps with it signed in I think it still updates and all

TB or root explorer when u buka system file, ontop got say how much is free

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Added on January 27, 2012, 1:19 pm

Oh no la, only if you click sign in to latitude previously and didn't sign out of latitude

Actually, when u buka maps, as long ur blue arrow no gambar/avatar ontop, you're fine =)

When got it shows you're signed into latitude