Just bought a new kbox mini (white) and an aspire cleito tank. And when I go to fire it, all it does is blink at me.... The first time the battery voltage reader blinked once saying 4.4v then followed with the ohm blinking 0.4, blinked 10 times. Made sure the tank wasn't on too tight and the coil was in the tank tight. Tried again, then the battery blinked a few times like it was dead then after it finished blinking it showed almost a full battery. I'm new to this and confused if it's the battery (its an old one), or its maybe a bad coil (even though it's brand new).