Please note: Slim design, square yellow plug. This item is a high-quality power supply. It is perfectly suitable as a replacement or secondary device and provides your Lenovo ThinkPad T440 20B7-S0HM13 with power 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 by no means an original product from the manufacturer and is therefore not manufactured or recommended by them. All brand and product names are the property of their respective owners and are only used for compatibility description.