So i bought a Tuglyfe tugboat 50w box mod with an igo-l and kangertech sub-tank mini, with ultra fire 18650 batteries, I used it twice and then my attys stopped working is it my battery? i am new to vaping just got my vape this Christmas. please help i also just ordered some inr batteries online of eBay to replace the ultra fire ones, i just want to vape.. i been waiting so long too. i am also pretty scared that my mod will blow up because i am not using the right amps or volts to power it. any suggestions will help