The 650 Vape Battery from OOZE Life is small and discreet but packs a major punch. Ideal for both public and private use, this battery will please newbies and veterans alike. Compatible with all 510 thread cartridges, it's powerful enough to easily vape the thickest of oil cartridges with 3.7V voltage. Featuring 20-second preheat mode, an auto-shut off function, and an over charge protection chip. This pack of 5 batteries is an incredible value, and a great addition to your current vape and smoking products!