Backwoods Twist 510 batteries are variable voltage vape pen batteries commonly used for oil cartridges, known for their 1100mAh capacity and adjustable settings via a dial at the base. They feature a 510 thread, making them compatible with most standard cartridges. Key Features and Specifications: Capacity: 1100mAh for long-lasting use. Voltage Range: Typically 3.3V - 4.8V (some models may vary, such as 2.7v-4.2v). Adjustment: Twist dial at the base to control voltage/power. Functionality: 5 clicks to turn on/off, with 2-click pre-heat options on some models. Safety Features: Short-circuit, overcharge, and overheat protection. Included Accessories: Comes with a USB charger. Usage Tips: Turning On/Off: Rapidly click the button 5 times. Voltage Adjustment: Rotate the dial at the bottom of the battery. Troubleshooting: If the battery blinks, it may indicate it needs charging or is not recognizing the cartridge.