The M3 510 threading battery features Stainless Steel Housing With No-Button Design, power by built-in 350mah, As Handy as a Pen Pen shape design makes M3 battery convenient for personal carry. Its stainless steel housing is highly customizable with different colors and logos. Inhale activated, self-adapted optimum temperature setting, and no-button design make M3 friendly to all user groups. Great Performance As the best match of CCELL cartridges, CCELL batteries are great examples of our pursuit of perfection. Through numerous tests, our engineers finally achieved the perfect balance between high performance and compact design. While high discharge rate provides generous amount of vapor, the handheld size assures best discreetness possible Brand: CCELL Battery Capacity: 350mAh Dimensions: 10.5 * 76.4H (mm) Stainless Steel Housing Standard 510 Thread Inhale Activated Built-In LED Indicator 510 Thread to USB Charging Enabled Available for Customization Over-inhale protection: 10±2s Each set contain: 1pc CCELL M3 Battery