The Puxos mod allows the user to be able to use three different battery types an 18650, 20700, and 21700. When using the 18650 battery the mod can go up to 80 watts, but when using a 20700 or 21700 battery the mod can go up to 100 watts. It comes with every function that Aspire has to offer: Wattage, Voltage, Bypass, TC (Temp. Control), and CPS (Customizable Power Setting). The system firmware is upgradable with new firmware updates from the Aspire website.