B4 China USB Charging Port Variable Volt Vape Battery

B4 Variable Voltage push button vape pen battery. The knob on the vape battery’s tip lets you change the voltage between 2.0 volts and 4.0 volts. The push button on the preheating unit activates it. B4 Battery Personalized button design,flash colorful variable voltage button. Bottom scale indicates the position of voltage level. 3.2v to 4.8v smooth turning voltage adjustment dial by evod twist bottom and button. The B4 510 Thread Vape Pen battery has a straightforward design and plenty of power to handle even the heaviest concentrates, so if that’s what you’re after, look no further.