Adapter perfectly matches BL1830 lithium-ion battery, BL1860, BL1850, BL1840, BL1830, BL1820, BL1815, BL1860B, BL1850B, and BL1830B. 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. Suitable for 18V lithium cordless power tools. Maximum initial battery voltage (measured without load) is 20 volts; rated voltage is 18 volts. This adapter enables compatible lithium-ion batteries to be used with 18V cordless power tools, extending runtime on existing 18V tools. Color: Black Material: ABS Notice: This adapter is not a charger and cannot be used to charge power tool batteries. Use only the battery charger for charging. Disconnect the adapter from the battery if not in use for extended periods. Package Contents: 1 × MT20ML battery converter (battery and power tool not included) 1 × English manual Note: Color may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.