Our one of a kind ?Deuce Deuce? battery is housed in aluminum alloy and is covered with a 24k gold finish. A magnetic 510 thread connector comes with every unit, along with a high caliber circuit board with multiple malfunction protection. Inhale activated so no buttons need to be pushed! PRODUCT DETAILS: Aluminum alloy housing made by CNC Built-In 510 thread magnetic connector Stealthy breathing LED indicator Quality circuit board with multiple protection Inhale activated Battery capacity: 380 mAh Micro-USB Rechargeable