Makita BL1850BDC1  LXT Lithium-Ion Battery and Charger Starter Pack, 18V Integrated L.E.D. battery charge level indicator allows user to monitor battery charge Provides up to 65% more run time per charge compared to BL1830 18V LXT Lithium-Ion 5.0Ah battery reaches a full charge in 45 minutes or less Battery delivers consistent power and run time in extreme temperatures, even in winter (-4DegreeF/-20DegreeC) Equipped with Star Protection Computer Controls to protect against overloading, over-discharging and over-heating