These are a high quality slim 510 thread battery! The 350mAh Variable Voltage Slim Vape Pen Battery w/ Bottom USB Charging has a sleek slim design 304 surgical stainless steel construction. Variable voltage 2.7(Green) - 3.3(White) - 3.7(Blue) - 4.1V(Red) delivered through a powerful 350 mAh lithium-ion battery that seems to last forever between charges (pass through micro USB charger included). Perfect for 510 thread oil cartridges and provides a sleek and stylish look!
5 clicks to power on/off
Press and hold during draw
3 clicks to change between voltage levels