Please note: Connector 5.5 x 2.5 mm. This item is a high-quality power supply. It is ideal as a replacement or secondary device and provides power to your ASUS ADP-90CD DB just like your conventional power supply, enabling reliable battery charging. Note: Unless we explicitly state that this is an original product, we supply a compatible product. This means it is not an original product from the manufacturer and is therefore not produced or recommended by them. All brand and product names are the property of their respective owners and are used solely for compatibility description.