Bought mi 5 yesterday.when I switch on my phone, it had 28% charge.then I put on charge for 1hr so the phone got charged upto 98% .i used for sometime like playing, using camera like that.the battery drained very fast.so updated to miui 8. Then again againi charged upto 100% .again tje phone charge drains very fast.My mi5 got little hot in my pocket & after then it got automatically switched off, still it is off & not taking charge. I went to a mechanic but he couldn’t find any points.