Hands down the best battery on the market. The air flow and low power mode it has is perfect for some terpy hits that still rip and blow alot of vapor. The battery looks discreet and stylish, and the top cover for the battery protects the cartridge when you drop it. There is no other batter that comes even close to comparison. And the vessel team is legit. I had a slight problem with mine so i ordered a new one after about a year, and i told them about it not expecting to get a new one, and they sent me another battery no questions asked with another charger. Im not the type of person to write reviews. But i had to write a review about this dope ass company.