Powerplus Dual Power Cordless Table Fan 20V without BatteryDiscover dual power. A completely new way of supplying energy to cordless tools. Dual power is a new generation platform that allows the use of two types of batteries. It consists of 20v and 40v batteries, which are combined with a number of cordless tools. The concept is simple but powerful. 20v battery is suitable for 20v dual machines, 40v battery is designed for 40v dual machines. But now we get a real innovative change: you can also connect a 40v