Welcome to the world of vaping. The inconsistencies in quality isn't just a Blu cig problem. As most of us know, all ecigs and accessories are manufactured in China. I own three different types of e cigs (Blu, HaloG6, Joye510) and the quality problems with batteries and cartridges come with all three. Atleast Blu Cigs has a good return policy and warranty.The best advice I can give is always buy from quality vendors with good customer service and return policies.