no the usb charger was purchased at my local vape store it is rated 4.2volts and 650mah on the output. I have my original eGo-t 420mah that I started ith and using it in a usb port it will charge in about 4 hours. I am currently using a wall plug charger with a usb port rated output5 volts 500mah. my usb cord is rated 5volt input no mah rating... I don't know much as I am a nood to vaping.. I have been vapin for two months