330D
From My Cold Dead Hands
I'm not sure what triggers the media service - maybe streaming video - but I found it when using the battery widget by geekyoup located here:
https://play.google.com/store/apps/...WVreW91dXAuYW5kcm9pZC53aWRnZXRzLmJhdHRlcnkiXQ
Also, I'm using the Advanced Task Killer by Rechild which really saves on battery life by allowing me to kill everything when I'm not using the phone:
https://play.google.com/store/apps/...iY29tLnJlY2hpbGQuYWR2YW5jZWR0YXNra2lsbGVyIl0.
You should use smart actions and not use task killers. They wreak havoc with the Android OS. I can't link it right now with my phone, but if you search a little you'll see....