Brass Knuckles Assorted 900mAh 510 Batteries Display of 30 510 Battery is just a regular battery, that gets attached to a Cartridge. Once the 510 Battery is attached to the Cartridge, it converts into being a Vape Pen. The Cartridge, comes along with a USB and is rechargeable. The Battery is only a battery and has no E-Liquid or Juice or THC in it. The reason why it is called 510 is because, 510 is a thread that helps screwing both the Battery and the Cartridge. Specificatios: 900 MAh Adjustable Voltage 3.2V-4.1V More Power 20 Seconds Hold Time *Size color may vary due to hand-made. 
                                                                
                                                                Assorted 
                                                            
                                                                
                                                                900mAh 
                                                            
                                                                
                                                                USB 
                                                            
                                                                
                                                                3.2V-4.1V 
                                                            
                                                                
                                                                Brass Knuckles  
                                                            
                                                                
                                                                Display-30 
                                                            
                                                                
                                                                Battery 
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