Motorola MOTO Q 9 Getting Started Manual page 35

Note: If your battery has been completely drained, it cannot be
charged via the USB cable plugged into the computer (this
connection will only maintain current battery life). Use a wall
charger or car charger to recharge the battery. Some
computer USB ports provide a higher current than others, and
will provide more rapid charging.
The mini-USB port does not support headphones. You must
use 2.5 mm headphones or a Bluetooth stereo headset.
Section 2B: Getting to Know Your Device 27