Firstsing CBD Vape Pen Electronic Cigarette Preheating Variable Voltage 400mah battery Suitable

Material: Copper, SS, plastic, PCBA
Cap: electroplating
Voltage:3.3V,3.7V,4.2V
Capacity: 400mah
Thread:510
USB: Pass through
This battery is a push button battery with adjustable voltage and preheat mode.
Built-in 400mAh high quality Lithium battery.
Press button for on/off, preheat and voltage adjustment.