6.0Ah Replacement Battery for Milwaukee 18V Xc Lithium 48-11-1820 48-11-1840 48-11-1850 48-11-1828 Cordless Power Tools Voltage:18Volts| Capacity:6000mAh| Battery Type:Lithium ion| Power:108Wh Replacemet Battery for Milwaukee M18 48-11-1811, 48-11-1815, 48-11-1820, 48-11-1822, 48-11-1828 , 48-11-1840, 48-11-1841, 48-11-1850, 48-11-1852, 48-59-181, 48-59-1850 Cordless Tools No memory effect. Can be charged or discharged as needed without loss of capacity Highest quality standards,Integrated microchip prevents overcharging & lengthens battery life. Come with 30 days money back and 1 year warranty. Any questions, please contact with us. Always  remove battery pack form your tool when you are assembling parts,making  adjustments,cleaning, or when not being used for an extended time. If you don&#039;t plan on using the Power Tool Battery for a month or  more,store it in a clean,dry,cool place away from heat and metal  objects.  Ni-Cd, Ni-MH and Li-ion batteries will self-discharge during storage; remember to recharge the batteries before use. Do not leave the battery dormant for long periods of time. We  recommend using the battery at least once every two to three weeks.