The Brass Knuckles 900mah battery is a must-have for any serious smoker. With its powerful 900mah capacity, you'll be able to enjoy your favorite concentrates for longer without having to constantly recharge. The sleek and durable brass design is both stylish and functional, making it the perfect addition to your smoking accessories. Its easy-to-use push-button design allows for effortless operation, while the compact size makes it perfect for on-the-go use. Don't settle for less – upgrade to the Brass Knuckles 900mah battery today.