What Gazella said. I rarely use Siri, so when I heard it was a huge battery drainer I turned it off. My battery life went up quite a bit. For me Siri is more of a gimmick than a tool. It is good for looking up words in a dictionary and some other tasks, but I rarely used it so it serves me better to leave it turned off until I need it. When I need it, I turn it on temporarily.