The Makita 18V LXT Lithium-Ion battery faster and works longer than orthodox lithium-ion batteries, giving you and your conductor tools nonpareil performance and productivity to take on the most demanding applications. The Makita 4.0 Ah battery more run time -LRB- 35 % more run time per charge than the Makita BL1830 battery -RRB- with a category-leading charge time of merely 40 minutes, so it spends more time working and less time sitting on the charger. For added convenience, it also an L.E.D. charge level indicator to monitor battery charge. The 18V LXT 5.0 Ah battery -LRB- BL1850 -RRB- is harmonious merely with Star Protection tools, by the Star Symbol and/or scandalmongering Battery Receiver under the tool. Makita 18V Lithium-Ion batteries self-discharge so they 're quick for use even after long periods of storage. The Makita Rapid Optimum Charger -LRB- sold separately -RRB- is a smart-charging that communicates with the battery during the charging process to monitor prevalent, voltage and temperature. This sophisticated charging technology optimize battery life and deliver a faster charge. In addition, the Charger a inherent fan to unfriendly the battery for faster and more prompt charging, even in igneous weather conditions. For developed tool performance and stretched battery life, Makita STAR Protection Computer Controls. STAR Protection is communication that allows the tool and battery to exchange data in true time and monitor conditions during use to protect against overloading, over-discharging and overheating. Makita, the innovation leader in conductor tool technology, the world 's conductor tool line-up powered by an 18V lithium-ion slide-style battery.