here's how long Ryobi estimates each fan can go without needing another charge. 40V HP Brushless Hybrid Whisper Series 20-inch Air Cannon ($229) -- 34 hours 40V 14-inch Hybrid Air Cannon Whisper ...

The benefit of your Ryobi power tools is how easy they are to use on battery power, but what do you do when your Ryobi ...

Many of Ryobi's fans — like its other power tools — can use powerful 18-volt and 40-volt batteries to operate cordlessly, so you can essentially use them anywhere for hours at a time.