Presenting the Slim Pen S2 510 threaded battery by iKrusher. The S2 is features a sleek, polished stainless-steel body, a universally compatible 510 thread and a long-lasting rechargeable 350mAh battery. It also has variable voltage settings and a pre-heat function, allowing end users to choose the temperature of their vapor and mitigate potential clogging issues. The 510 threading on this button-activated battery is compatible with all 510-threaded vape cartridges!Voltage can be changed by clicking the button 3 times rapidly. Click the button 2 times rapidly to pre-heat.Green: 2.7vBlue: 3.4vRed: 4.2v (Default)CannaZip is excited to offer iKrusher’s lineup of rechargeable, reusable 510-threaded cartridge batteries. Our 510 batteries are universally compatible with any 510-threaded vape cartridge!