This wall charger with 18 Watt Super Fast Charge capability uses Power Delivery (PD) to provide the most efficient charge possible. Any PD device can charge at up to 18W. Other USB-C devices rates will vary. Multiple built-in safeguards (CE/ FCC/ RoHS certification) and intelligent IC s technology protect against short circuit, over-current, over-voltage, over-heating, and over-charging.