I like my 650 mah kit so much, I just bought another one! I guess I could have gone bigger, but I really like how small the VGO is and fits in my hand so well. I'm going to give one of my used VGO batts to my sister to try, she's kind of been giving it the eye. I figured she could use it a while and save her pennies to get a new kit if she likes vaping it as much as I do.