WHAT DOES USB CHARGER BLOCK MEAN?

This product has the many power with the charger provided with a 15- or 16-inch MacBook Professional but is scaled-down and charges a lot less. The included cable is removable and replaceable, in case it will get weakened.The RAVPower 90W GaN Tech Wall Charger is actually a former enhance choose, but in any other case similar versions are more powe