This app drains the battery life out of my phone

This app drains the battery life out of my phone in 3 1/2 with out any usage on the phone, because NBC 5s app has to have access to my location at all times, even when you arent using the app!!!! Please make a feature that allows location services to be only used when the app is open!!!! Otherwise it is a great app!

NBC New York City about NBC 5 Chicago: News & Weather, v5.1.22