The Aspire CF Maxx is high-end variable wattage vaping mod. This battery features stainless steel endpoints, a metal button, and a carbon fiber coated tube. Aspire has launched an sub-ohm ecig battery that can take resistance as low as 0.3 ohms. The Aspire CF Batteries contain a revolutionary spring connector. This unique technology ensures that there will always be a strong connection between the battery and e-cigarette tank. 5-50W adjustable wattage allows it to use with different resistance atomizer.