The Makita 18V LXT Lithium-Ion battery charges faster and works longer than standard Lithium-Ion batteries. The Makita 6.0 Ah battery, model BL1860B, combines more run time (two-times more run time per charge than the Makita 3.0 Ah battery) with a category-leading charge time of only 55 minutes so it spends more time working and less time sitting on the charger. The 18V LXT 6.0 Ah battery is compatible only with STAR Protection tools, indicated by the star symbol and/or yellow battery receiver under the tool. Makita 18V Lithium-Ion batteries resist self-discharge so they’re ready for use even after long periods of storage. In addition, the charger has a built-in fan to cool the battery for faster and more efficient charging, even in hot weather conditions. STAR Protection is communication technology that allows the tool and battery to exchange data in real time and monitor conditions during use to protect against overloading, over-discharging and overheating.