This item is a high-quality power supply. It is well-suited as a replacement or secondary device and provides power to your 8640HC just like your previous power supply, enabling reliable battery charging. Quality is our top priority. This means that this power supply for the 8640HC model is new and unused. Our own quality assurance ensures a high standard of quality. Unless we explicitly state that it is an original item, we supply a compatible product. This means it is not an original 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.