Worked for a year and a half. Began to turn on badly. I thought it was the button. Got to the battery. He goes into some kind of protection and turns on according to his mood. All batteries are in order, the total voltage is 20V. There's a glitch in the electronics somewhere. Well, business, I think I'll buy a new battery. But no! Its cost is approximately equal to the cost of a kit with a new screwdriver, 5-6 thousand! Yes, it’s better to take an eternal boss for that kind of money. In…