Advantage:This adapter enables the listed lithium batteries to be used on for 18V tools, and lets you enjoy the advantages of extended operating time of lithium-ion batteries on existing 18V tools. Use for:Can use the 18V lithium battery and the backup battery in most for batteries: BL1860B / BL1860 / BL1850B / BL1850 / BL1840 / BL1830B / BL1830 / BL1820 / BL1815 etc. Compatibility:Compatible for P102, P103, P104, P105, P107, P108, P109 and fit for 18V ONE+ System Cordless Power Tools. (NOTE: Not fit for cordless saw P551, for 18v radio, lamp eg, for P742 P746). Attention:It cannot be used to charge the battery of a power tool, and the adapter cannot be plugged into any charger. If you need to charge the power , use the old battery charger. And High Quality ! Type:Battery Convertor Adapter Model: MT20RNL Rated voltage 18 V Rated current:3 A Compatible FOR 18V CORDLESS PLUG TOOLS. color:Black Material:ABS+PC size:109 x 81 x 90mm Package Contents: 3 x MT20RNL Adapter 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.