Stratus Lithium Ion Batteries are designed to evenly distribute, power and connect to your batteries and cartridges/attachments during vape sessions. Features include spring loaded pins to ensure full connection between battery and cartridges/attachments. They are built with a PCB safety microchip sensor to ensure maximum protection and activation/lock safety regulator. Size: h 2.922 in, d 0.36 in Developed & Designed by Atmos Nation. ( Patent Pending ) Price: $ 12.95 Read More and Buy it here!