Got my blue shortie in the mail today and was super excited but...put a brand new cappuccino cart on and.....nothing! so I put the cart on a regular auto battery and got tons of vapor! Thought maybe the shortie maybe just needed charged but I put it on the wall charger and the charger light stayed green so I tried the pcc and the red light doesn't light up. So I'm assuming I got a bad one or am I missing something obvious?