Introducing the Brass Knuckle Variable Voltage 510 Thread 650mAh Battery: the ultimate choice for your vaping needs. This sleek and durable battery is specifically designed for 510 thread cartridges. With variable voltage settings, you have full control over your vaping experience. The 650mAh battery ensures long-lasting power, allowing for extended vaping sessions. Elevate your vaping journey with the Brass Knuckle Variable Voltage Battery and enjoy the versatility and reliability it offers.