What do you think about feeding the board with an USB 5V 2A from a power supplier such as
Anker PowerPort 6 Indoor Black mobile device charger - Mobile Device Chargers (Indoor, Universal, AC, CE, FCC, UL, Black, 100 - 240)
and connetcing the board to USB splitter Y
With the Red connector to the power supplier and the Black one to the PC running Arduino IDE and the micro connector to the board.
Thanks for your attention.