Advantage:This adapter enables the listed lithium batteries to be used on for 18V , and lets you enjoy the advantages of extended operating time of lithium- batteries on existing 18V . for:Can the 18V lithium battery and the backup battery in for batteries: BL1860B / BL1860 / BL1850B / BL1850 / BL1840 / BL1830B / BL1830 / BL1820 / BL1815 etc.Compatibility: for P102, P103, P104, P105, P107, P108, P109 and fit for 18V ONE+ System Cordless . (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 tool, and the adapter cannot be plugged into any charger. If you need to charge the tool battery, the old battery charger.Brand New And High Quality Type:Battery Convertor Adapter :MT20RNLRated voltage 18 VRated current:3 A FOR 18V CORDLESS PLUG .color:BlackMaterial:ABS+PCsize:109 x 81 x 90mmPackage Contents:1 x MT20RNL AdapterOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.