Adapter perfectly matches for BL1830 lithium-ion battery BL1860/ BL1850/ BL1840/ BL1830/ BL1820 /BL1815/BL1860B / BL1850B / BL1830B. Replace lithium ion battery 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, 48-59-1850. Suitable for 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 can make listed lithium batteries use for 18V lithium cordless power tools, and let you enjoy the advantages of extended run-time of Li-Ion Batteries on your existing 18V tools. Color: Black Material: ABS Notice: It cannot be used to charge the battery of power tools. This adapter is not suitable to charge power tool batteries. If you need to charge the power , please use the original battery charger. Please separate it from the battery if you are not planning to use the adapter for a long time. Package Contents: 2 x MT20ML battery converter (NOT Included Battery and Power Tool) 2 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.