this is from a thread about the Kgo:
What does it mean when the Kgo battery blinks three times when pressed and does not function but is charged?
One of four things:
1.) you've got juice in the connector.
Take a dry paper towel get it in there and clean it out.
2.) It's not making a good connection.
Use a small screwdriver and carefully pry out, just a little, the center pin on your carto(if you're using a carto) and pry up (very gently) on the center pin on the battery, making sure not to gouge the seal between the pin and the threaded area.
3.) your atomizer is bad(if you're using an atomizer)
The last one was the battery is done for-but you said it works otherwise so I didn't copy that part

Hope that helps some!