Please note the power specifications and the connector size of 7.9 x 5.5 with a center pin. This item is a high-quality power supply. It is ideal as a replacement or secondary device and provides power to your Lenovo ThinkPad W500 just like your standard 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 made or recommended by them. All brand and product names are the property of their respective owners and are used solely for compatibility description.