Experience the power of Makita with the BL6440 64V max 4.0Ah Li-Ion Battery. Featuring a fast 120-minute charge time and a ventilation system for extended battery life, this heavy-duty battery is compatible with the 64V max Brushless Cordless 21" Lawnmower w/XPT and equipped with a convenient handle for easy installation and removal. Trust in Makita's durability and expertise for all your power needs.