Hi. Can my Nintendo Switch overcharge if I charge it overnight with the charging cable?
No from 100% the circuit breaker switches off the power in the device.
No she does not
In today's devices, the battery charge is electronically regulated and switched off when it is full. Often the message "Battery 100% full" comes up after the end, I don't think so with Nintendo
I always have my Switch in the dock and it charges so even when I watch TV it is always full. She overloads her. But not the battery could break after a long time.