BenQ S670C - Manual (Page 19)

Preparing Your Phone For Use 3
2. Insert the charger connector into the charger socket on the bottom of
the phone. Make sure that the connector is inserted in the correct
orientation (with the arrow pointing up).
3. Insert the charger into a power outlet.
4. Once the phone is fully charged, remove the charger from both the
power outlet and the phone.
Charger connector
Charger socket