Adapter is compatible with BL1830, BL1860, BL1850, BL1840, BL1830, BL1820, BL1815, BL1860B, BL1850B, and BL1830B lithium-ion batteries. Replaces lithium-ion batteries XC 48-11-1815, M18B2, M18B4, M18BX, 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, and 48-59-1850. Designed for use with 18V lithium cordless power tools. The maximum initial battery voltage (measured without a working load) is 20 volts, and the rated voltage is 18 volts. This adapter allows the listed lithium-ion batteries to be used with 18V cordless power tools, providing extended runtime benefits. Color: Black Material: ABS Notice: This adapter cannot be used to charge power tool batteries. To charge the battery, please use the charger. If the adapter will not be used for an extended period, disconnect it from the battery. Package Contents: 1 x MT20ML Battery Converter (Battery and Power Tool Not Included) 1 x English Manual Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement error allowed is +/- 1-3 cm.