510 Thread BatteryThe Twist Slim Pen 2.0 is a sleek, reliable vape battery that will become your new daily driver. The upgraded features include better flex temp, longer battery life, pulse wave tech, and automatic shut-off.The Twist Slim is equipped with flex temp, which means you can select a voltage level from the range 2.0V to 4.0V to heat the device. This is a lower voltage range than the original and is better suited to properly heat oil cartridges without burning them.There are 2 easy ways to get your fix with the Twist Slim! Use it just like the original and press the button down while taking a draw. You can also skip using the button completely and just take a rip!