Brass Knuckles Battery 900 mAh + USB Charger The Brass Knuckles battery is a top choice for vapers seeking reliability with prefilled or empty vape cartridges. With a capacity of 900mAh, it ensures extended battery life, eliminating the necessity for frequent recharges. A USB charger is provided for convenient and rapid charging when needed. Connections: 510 Thread Capacity: 900mAh Brass Knuckles Pen Design The Brass Knuckless pen product boasts a durable construction and an attractive design, making it ideal for quality-conscious customers. Measuring 94.9mm in length and 14.0mm in width, it weighs only 19.6g for easy portability. Its refined design suits busy individuals who appreciate style and practicality. Length: 94.9mm Diameter: 14.0mm Weight: 19.6g Brass Knuckles Vape Pen Compatibility with THC & CBD Cartridges The Brass Knuckles vape pen battery is compatible with cannabis concentrate oil cartridges. A lower voltage produces a more flavorful vaping experience. Nevertheless, using a higher voltage results in denser clouds and a higher vapor intensity. For precise control, consider reading the Brass Knuckles battery instructions. Green Light - Low: 3.2V Blue Light - Medium: 3.7V Red Light - High: 4.1V