We have two 4s iphones and since iOS7.02 the battery empties out in about 5hours. And when it hits 10% it shutsdown most of the time. I asked my friends on facebook and about 10 people have the same issue. Moest with 4s, some with 5. Why is there no big thread on this topic? You guys expierencing the same? Please don't tell us to do a DFU install, because we should not do it. Apple should fix this issue. I have all the battery drain options disabled btw.