Asus Fonepad Note 6 - Manual (Page 22)

ASUS Fonepad E-Manual 
Charging your ASUS Fonepad
Charge your ASUS Fonepad for eight (8) hours before using it in
battery mode for the first time.
Connect the micro USB cable to the power adapter.
Plug the micro USB connector into your ASUS Fonepad.
Plug the power adapter into a grounded power outlet.
To charge your ASUS Fonepad: