Makita 18V LXT Lithium-Ion batteries charge faster and work longer than standard lithium-ion batteries, giving you and your Makita cordless tools unmatched performance and productivity for demanding applications. The Makita 3.0Ah battery (BL1830B) has a category-leading charge time of only 30 minutes, so it spends more time working and less time sitting on the charger. Makita is the innovation leader in cordless tool technology and has the worlds cordless tool line-up powered by 18V lithium-ion slide-style batteries. The BL1830B is compatible only with Star Protection tools, indicated by the Star Symbol and/or Yellow Battery Receiver under the tool. The Rapid Optimum Charger (sold separately) is a smart-charging system that communicates with the battery during charging to monitor current, voltage and temperature. This helps optimize battery life and deliver a faster charge. The Charger has a built-in fan to cool the battery for faster and more efficient charging.