Hallo everyone, I have a XPS 15 7590 and when I wanna wake my laptop up from sleeping it's saying it doesn't have any battery left. Today I went to school with my laptop left at 66%. When on school I wanted to write down what my professor was saying so I took my laptop and when turning on my laptop said: "warning low battery". Back on my dorm I plugged in my laptop and it said 65% left and charging.

I went looking in the BIOS and starting with AC power isn't on. For the rest Dell Power Manager is saying my battery is excellent. I'm having this trouble after updating my BIOS to version 1.8.1. I only have my laptop for one year and it's a very good one. I hope you can help me with my problem.

Thank you.