Makita 18V LXT Li-Ion Tool Battery 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. Delivers consistent power and run time in extreme temperatures 4 F/-20 C . Equipped with Star Protection Computer Controls to protect against overload, over-discharging and over-heating. For use with all Makita 18V lithium-ion power tools. Voltage 18V, Type Lithium-Ion, Ampere Hour 5.0 Ah, Charging Time 45 Min., Warranty 1 Year, Pkg Qty 1, Package Type Clamshell WARNING Cancer and Reproductive Harmwww.P65Warnings.ca.gov