Why does the drone cut down when the speed increases?

Question

Electronics

The bottom line is, when the motors are without screws, everything is OK, I increase the speed, everything is fine. As soon as I hang the screws and increase the speed, the drone is completely cut down. It's like the food was cut off. Powered by LiPo 3.7V.

Answer 1

the supply voltage drops below the cut-off level of the processor.
without fans, engines consume less power and draw less voltage.

Answer 2

A banal question, but have you tried to charge it?) 3.7V - the nominal voltage of an almost discharged battery, a charged one has a voltage of 4.2V