Why is the battery on my XL so weak???! 2 hours and 30 minutes of screen on time and 50% is pathetic! I have literally every single feature off! Gps, bluetooth, nfc, google assistant and brightness set to like 15 percent. My S7E use to be way better, i would be at 4-5 hours SOT. Wtf. How does this phone suck so much juice by doing nothing except browse the web on very low brightness