This is a good charger and it's fast about 4× faster being 20w and standard chargers are 5w. These are great to have extra on hand so if yours quits work you have a spare because most times when they do go out it's at the most inconvenient time. And if you have to pickup one at a convenience store you'll end up paying way more than it's worth. So don't be put on the spot and forced to buy a cheap charger at an inflated price and usually they are low quality so buy a couple of these and be prepared. These are a great value as well.