The Aspire CF Mod series are high-end e-cigarette power systems. This mod series features stainless steel endpoints, a metal button, and a carbon fiber coated tube.The Aspire CF Mod contains a revolutionary spring connector. This unique technology ensures that there will always be a strong connection between the battery and e-cigarette tank. The structural design and control circuit of this battery series makes using it extremely reliable and stable. The Aspire CF mod supplies intense power for tanks which have no wattage limitation.