Hi Brad, That is an ego knock off, notice there is no indent at the battery collar, and the button is an opaque rubber. If it where an eGo model it would have a clear hard plastic button with a white led and a slight indent at the collar level around that button. Yours most likely is a blue led under that rubber button. It is almost certain that it is a 650mAh unit also.And I also see a solid type dripping atty atop your little unit, the type without the hole down the center only left and right above the
threads(at least that's what it looks like to me)
With that said it would be safe to assume that any ego 420mAh charger would charge your battery without causing you any issues. One like this should do just fine
USB Charger for GP eGo 420mah Good Luck. Happy Vaping.