hi, basically i bought a kangertech dripbox a couple weeks ago and its been working fine, all of a sudden yesterday it ran out of battery (i thought it had ran out of battery). so i got home and charged it and nothing, the battery said it was fully charged but when i press the fire button it flashes 10 times as if it has ran out of battery, i've tried almost everything i can think of for example clean all of the contact points and checked the coil, i hope someone can help! thanks