Battery issue and new Siri Voices

Hello
I use an iPhone 6S and also make use of the New Siri US female voice and the Siri Australian voice. After installing IOS 11.3 I discovered the phone's battery drains much much quicker. Not the case though when I use Oliver compact voice or any of the other built in compact voices. Does anyone experienced the same thing. I like the new Siri voices so much.