Brass Knuckles vape pen battery is designed to utilize concentrate oil vape cartridges and comes in three variations of wood, silver, or gold finish. Brass Knuckles vape mod battery features 900mAh capacity with variable voltage and Preheat mode. Brass Knuckles battery works as basic vape pen battery with variable voltage and single button operation settings: 5-clicks will turn on or off the battery, 2-clicks will activate the Preheat mode for 10 seconds and 3-clicks will switch the voltage, LED light will change the color according to the voltage settings: Green – 2.4V | Blue – 3.2V | Red – 4.0V
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