Makita BL1840 18V 4.0AH Battery by Makita 18V LXT 4.0 Ah Lithium-Ion batteries charge in 40 minutes or less Compatible with Makita 18V LXT and 18V Compact cordless tools with the Star symbol World's largest cordless tool line-up powered by an 18V Lithium-Ion slide-style battery Provides up to 35% more run time per charge Delivers consistent power and run time in extreme temperatures, even in winter