Exclamation Media Server + battery on android

my media server is at 50+% all the time and my battery runs out really fast. i get 30mins of hd video on balance mode and if i choose save battery mode the video stutters when playing hd videos (so it gets annoying to watch). does anyone have this problem or have a solution to sort it out?

on max setting while playing dead trigger 2 i get 1% a min of battery usuage
on balance setting i get hd video + wifi + 0 brightness + 0 volume 30mins per 10% of battery (same with browsing web)
on saving i get 40ish mins per 10% of battery while browsing web

my media server is always 50+% even after i turned off all sync uninstalled apps and even after factory reset

i got a tegra note 7