Makita 18V LXT Lithium-Ion batteries charge faster and work longer than standard lithium-ion batteries, giving you and your cordless tools unmatched performance and productivity to take on the most demanding applications. The Makita 4.0Ah battery combines more run time (35-Percent more run time per charge than the Makita 3.0Ah battery, BL1830), with a category-leading charge time of only 40 minutes so it spends more time working and less time sitting on the charger. Makita 18V Lithium-Ion batteries resist self-discharge so they’re ready for use even after long periods of storage. For improved tool performance and extended battery life, Makita created STAR Protection Computer Controls.