Mobile -- Smartphone power issue.

I noted 2 issue to kill my mobile phone power, and point 1 that's big trouble.

1. My smartphone is Samsung galaxy S2, I find if run diamond dash and keep
    on active mode.... OMG it 'll take power 10~20% per hour ... crazy !!
2. About media server, I find only one way to that is stop working ... delete all media ~
    for this my phone is clear without any music and video ... oh shxt !