Battery issues with iOS 11 on iPad Air 2

Hi y’all.

I updated both my iPhone 7 and my iPad Air 2 immediately after the update was available. No issues anywhere, except that it feels like my iPad is burning through battery suddenly. Last night, in standby, I went from 50% battery to 22% in about 20 munites – meaning without actually using it.

Do any of you experience the same? Any ideas on how to improve this?