1. The Brownies Retro Yellow Slim Twist Adjustable 510 Battery is a highly versatile battery that is perfect for vapers who want complete control over their vape experience.With its slim and stylish design, this battery is both highly portable and easy to use, making it the perfect choice for on-the-go vaping. Whether you're a seasoned vaper or just getting started, this battery is sure to provide you with the power, versatility, and convenience you need to enjoy your favorite e-liquids to the fullest.