With MTB18DYL, you can use the for 18V Li-ion battery or for HongSong JiangMi ZhiPu on 21V Lithium tools. The bottom of the converter applicable for 18V battery model: BL1815, BL1815B, BL1820, BL1820B, BL1830, BL1830B, BL1840, BL1840B, BL1850, BL1850B, BL1860, BL1860B, BL1845, BL1890, BL1890B. And suitable for HongSong / / BoDa / / ZhiPu / JiangMi 18V lithium battery. Note: This product is only adapter. This product does not include machine and battery. The machine and battery in the product description are only used to show the products. Colour: Black Material: Plastic Package Contents: 6 x Adapter The appearance of the product from batch to batch, but it does not affect 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.