Classic  Slim Vape Battery Features: * Strong 400mah Battery * 3 Temp Settings * 10 Seconds Preheating for Thick Oil * Bottom Micro USB port Specifications: Battery Capacity: 400mAh Length: 90mm Diameter: 11.2mm Output Voltage: 2.4V, 3.2V, 4.0V Preheating Output: 1.2V Preheating Time: 10s (Grade A+ Battery Cell only) Diameter: 11.2mm Output Voltage: 2.4V, 3.2V, 4.0V Preheating Output: 1.2V Preheating …