This item is a high-quality power supply. It is ideal as a replacement or secondary device and provides power to your Canon EOS 500D just like your conventional power supply, enabling reliable battery charging. As one of the largest suppliers of batteries, power supplies, and chargers, we have a very extensive inventory and thus a high delivery capability. Our customers greatly appreciate this high availability, combined with first-class service. 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 produced or endorsed by them. All brand and product names are the property of their respective owners and are only used for compatibility description.