Battery Features: Battery type: Li-ion,voltage: 18V,capacity: upgrade 6000mAh,100% brand new replacement for milwaukee m18 battery Widely Compatible: 100% compatible with milwaukee 18v cordless power tools, replacement for M-18 48-11-1811, 48-11-1815, 48-11-1820, 48-11-1822, 48-11-1840, 48-11-1841, 48-11-1850, 48-11-1852, 48-59-1850 etc Milwaukee m18 batteries High Performance: Built-in premium Li-ion battery cells provide fast charging and low power consumption, no memory effect, Intelligent Protection against potential damage caused by over-charging, over-discharging, over-voltage, over-current,short-circuit Professional certification: CE/RoHS/FCC certified and 100% brand new. Safeguard features against incorrect voltage, battery overload, short circuit, internal overheating. Besides,4 pack batteries, you can charge the battery at any time, nver to wait,very convenient to use After Service : Please contact us if you have any concern about this item. We will try our best to promise you an enjoyable shopping experience 18V Replacement battery