I had a currupt file (picture) on my SD card a while back. As a result I was showing a high battery use. I had to go through all of my pic to find the currupt one. Removed it and the phone was all good. The wife had the same issue only hers was a currupt music file. Try removing your SD card and see if the media server battery use goes down. If so a currupt file would be my guess. Good luck
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