Since its inception, Vapors and Things has maintained a reputation of quality products, and the reasons why are apparent in our 510 Thread Adjustable Slim Battery. Our 400mAh slim batteries come in Black and Silver. They are perfect for use with cartridges as well any other pre-filled 510 Tanks. Control your Vapor with 3 different heating levels. We make our batteries from the strongest, most durable, and most stable materials available to insure that it will last for as long as you care for it. Our batteries generally last at least 300 charges, which can translate to over a year in real world time. Slim Batteries are compatible 510 Threaded tanks.