Exteremly perplexed. Out of the box this things battery was amazing on day 1.. 5 hours sot from 60pc to 20+. On day 4, just watching YouTube and scrolling on Instagram for 40 minutes the battery dropped 10pc! Disappointing for a 7nm chip and 5000mah. Ive been monitoring battery consumption and apps, which I haven't installed much. Projected to have 55 hours left on battery, 70 hours on saving and 230 hours on ultra. Do you guys think it's still calibrating?