Please note the performance. This item is a high-quality power supply. It is ideally suited as a replacement or secondary device and powers your DELL INSPIRON 1564 just like your conventional power supply, enabling reliable battery charging. Note: If we do not explicitly state that this is an original product, we will 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 used solely for compatibility description.