The upgraded version eVic Primo 2.0 mod comes with carbon fiber design on the battery cover, more special. It is also powered by dual 18650 high-rate batteries where max output can be reached to 228W. Equalizing charge technology was applied in order to bring all cells to an equal state of charge. The mod also can be served as a power bank to charge other e-cigarettes or electronic devices. It features onboard reverse polarity protection and dual circuit protection. You also can upgrade firmware to get lastest version 4.05, real-time clock, preheat, custom logo, and reverse charging are all available..