With the Battery Adapter Converter, you can use the for 18V Li-ion battery on for A3 48F 88F Lithium tools. 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. name:Adapter 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. Color: black Material:Plastic Package Contents: 2 x Adapter(Battery not included) 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.