Premium cartridges need premium batteries, TOQi has smart circuitry that provides a predictable and consistent experience that cheaper 510 batteries cannot match. The TOQi 510 system micro-adjusts to provide measured and consistent temperature settings that will not overheat or burn your cartridges/concentrates. Enjoy smooth pulls with all the flavor. Including USB-C and industry only for 510 cartridges: Qi-compatible wireless charging • Battery: 400 mAh (Li-Ion) • Wireless Input: 5W • Charging Input: 5V, 1A • Charging Port: USB-C • Wireless Charging: Qi Standard • 510 Thread Cartridge: CCELL (TH2, M6T) • Voltage: 2.8V, 3.2V, and 3.6V • Dimensions: 98 x 30 x 10.45 (mm) • Weight: 34.4g