Apple Watch battery life

I purchases an Apple Watch series 1 week ago and the battery last no more than 4 hours, I have reduce brightness, use a non modular skeen on the screen and nothing helps, how should I contact for a revision or a diagnostic to review for a warranty and get a replacement before own the series 4 I had a series 2 and using the same way the battery last no less than 20 hours attached photos of Today charge duration