The Square XL Reload is a quality electronic cigarette that is very convenient and easy to use. Built with longevity as a priority, The Square XL Reload comes with 650mAH rechargeable battery and a replaceable 3mL flavor cartridge. That's equivalent to approximately 1,000 puffs. The Square XL Reload is the perfect companion to an e-cig smoker. The cartridges are easy to replace and are available in various flavors and nicotine levels.