MAKITA 18V 5.0Ah Lithium-Ion Battery BL1850B-L

Integrated L.E.D. battery charge level indicator allows user to monitor battery charge Up to 33% more run time per charge compared to BL1830 Fast 40 minute charging time Battery delivers consistent power and run time in extreme temperatures, even in winter (-20°C) Impact-resistant outer case and shock-absorbing inner-liner are engineered to protect the battery Sixteen contact terminals maintain a constant connection with the tool to help prevent power loss or fluctuation, even during high-vibration applications Battery resists self-discharge and remains ready for use even after long periods of storage Sensitive electronics are protected with a thick gel coating, preventing damage against dust and moisture Star protection computer controls - includes overload protection, over-discharge protection and over heat protection The battery and tool communicate, protecting your tool and battery from overload by cutting power when put under abnormally high current draw If the battery reaches a certain level of heat it will cut power to the tool, protecting the tool and battery from overheating