With MTB18DYL, you should use the for 18V -ion battery or for HongSong JiangMi ZhiPu on 21V Lithium tools. The backside of the converter relevant for 18V battery model: BL1815, BL1815B, BL1820, BL1820B, BL1830, BL1830B, BL1840, BL1840B, BL1850, BL1850B, BL1860, BL1860B, BL1845, BL1890, BL1890B. And well matched for HongSong / / BoDa / / ZhiPu / JiangMi 18V lithium battery. Note: This product is simply adapter. This product does not consist of machine and battery. The machine and battery in the product description are only used to expose the products. Colour: Black Material: Plastic Package Contents: 1 * Adapter Only the above package content, other merchandise should not included. Note: Light and diverse displays can cause the colour of the object within the picture just a little assorted from the genuine thing. The measurement allowed error is +/- 1-3cm.