Comentario oficial
From Q3 on this FAQ page, it recommends using an external power supply with the WeGO3 in order to prevent power drain, and this page, which outlines using the WeGO3 with Android devices, notes that the WeGO3 does not charge the Android device when connected - reason being, the Android is on the "host" end of the cable, and devices never send power back to the host. Sorry!