Specifications: Height: 99.6mm Width: 42.6mm Depth: 14.1mm Weight: 89.8g Material: Zinc Alloy + Plastic Battery Capacity: 1500mAh Cartridge Capacity: 3ml/2ml Charging Current: 1.0A Coil Resistance?0.6?, 0.8? Output Wattage: 5-40W Working Voltage: 3.3-4.2V Charging Time: 2H