I assume you're talking about the Janty "fast charger". That consists of a USB-powered charger.. and it comes with a wall adapter so you don't have to plug it into a USB port on your computer.
I don't have that specific wall adapter... but I'm guessing yours has a red power light on it. That doesn't indicate the charging status. The small LED on the barrel of the USB charger tells you the charging status. Red for charging, green for either "done", or no battery attached.
I don't have that specific wall adapter... but I'm guessing yours has a red power light on it. That doesn't indicate the charging status. The small LED on the barrel of the USB charger tells you the charging status. Red for charging, green for either "done", or no battery attached.