Yup, it's different now.
Please see this thread and my post as i believe its the answer your all looking for...
It was already answered here. It appears when the iPhone is plugged in.
The iPhone is plugged in, but it eventually disappears when fully charged!
Haven't charged since 7.0.2 so maybe that is a new behavior. Did not do it on mine under 7.0
Its the same on iOs 7.02 ..no changes has been made to determine whether the phone has reached the exact charging point ..in iOS 6 it will reach 100 % but the "plug" indicator comes in when its fully charged at 100% ..
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