Makita XBU02PT DEMO 36-5/8" Brushless Blower with (2) 5.0Ah Batteries is electronically controlled to optimize battery energy use for up to 50% longer run time per battery charge than similar non-brushless tools. Electronic controls efficiently use battery energy to match the changing demands of the application for increased power and speed when needed. With no carbon brushes, the Makita BL™ Brushless motor runs cooler and more efficiently for longer life. When powered by two 18V 5.0Ah batteries, the efficient brushless motor delivers up to 28 minutes of run-time on dial setting #3 on a single charge.