Me either. Any solution?

In case that the problem remains after being in safe mode, they replace the phone? what's the policy?

what's the problem? I will try the safe mode as well to be sure that there is no drainage from any application

80% drain of battery with 2.5 hours screen time for a 900 USD phone

There is a problem with the Exynos Variant. I face the same problem, the battery is really average, max 4 hours of screen time comparing to 8 hours for the snapdragon model. I hope it will be fixed soon with an update.