Thanks for your answer.
The restart can happened anytime, with or without the charger plugged.
By the way, my battery doesn’t hold 6 hours of use, it’s more between 3 and 4 hours. Ok, I often play onlineĀ game and I watch TV by internet every evening, but I have to plus the charger 2 or 3 times a day.
Yes, I didn’t found a better SSD so far (very hard to find a good SSD in 2242 size).