I had this for 15 days, used it 3 times. The third time it was a little tricky to turn on, I thought I was doing something wrong. The fourth time I tried to turn it on (when I really needed it) and it would not come on at all. It was fully charged,  I tried the refresh + power button and the 15 second long press power button many times. I opened it one last time before I returned it and there was a spark and smoke came out near the hinge on the left side. No thank you, Lenovo.