I dont know why I upgraded. Battery life was amazing on my iPhone 11 Pro Max on 13.2 and now its terrible on 13.3.1 Im down to 85% battery and its not even noon, when on 13.2, I would still be up around 95%. I could go two days without charging my battery on 13.2 and now Im lucky if I can make it till 4-5pm before my battery hits 50%. How and why did this happen? I should have stayed on 13.2 thanks a lot Apple.