Makita 18-Volt 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. It also features an LED charge level indicator to monitor battery charge. Makita is the innovation leader in cordless tool technology and has the world's cordless tool line-up powered by 18-Volt 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. Makita 18-Volt Lithium-Ion batteries resist self-discharge so they're ready for use even after long periods of storage. 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. For improved tool performance and extended battery life, Makita created STAR Protection Computer Controls. 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.