You can't turn it off system wide without hacking things up pieces... But why would you? Google has spent the better part of, what, the last 4 years improving how apps and services use power... Back in JB days, having a rogue app kill your battery in what seemed like minutes was common... I used to reboot my S3 at night just to avoid waking up to a dead phone... Which happened far too many times.
Best piece of advice? Just walk away... Don't fuss with anything in there and you'll be better for it.