Default Battery drain Samsung official 4.3

Hello all

I updated my phone today to 4.3 via sammobile and until now i am with abnormal battery drain. Even charging with usb cable in pc, still the battery level is going down. This is not a normal behavior since in 4.1.2 it dont happen. Is anyone getting this? Maybe flashing a modem to my region will solve it? (I downloaded the germany update, but im in brazil)
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