Makita XRU08Z 18V LXT Lithium-Ion Brushless Cordless Curved Shaft String Trimmer, Tool Only Delivers up to 37 minutes of run time on high setting and 44 minutes on low setting under load using 18V LXT 5.0Ah battery BL1850B (battery not included) BL Brushless motor delivers up to 6,000 RPM for faster cutting Efficient BL Brushless motor is electronically controlled to optimize battery energy use for up to 50% longer run time per charge The BL Brushless motor eliminates carbon brushes, enabling the BL Motor to run cooler and more efficiently for longer life Telescoping curved shaft adjusts (60-1/2" - 64-1/2" length) for convenient operation in tight places