Works for 18V Series Lithiun Battery Fits replacement for V20 Tools( Not Compatible with OLD 20v & 19.2v C3 Tools, and Not for Batteries), ,for 20V Battery Replacement.Use with for V20 system cordless tools only (not compatible with Old for 20V tools).Perfectly for 18V Li-ion Batteries BL1830 BL1840 BL1850 BL1860 BL1860B BL1850B BL1830B BL1820 BL1815, converting your for battery into for Crafts-man V20 volt Lithium-ion Battery. compact design for easy installation. If not used for a long time, please separate from the battery.Do not use the adapter to charge the battery Remove the adapter when you need to charge the battery.Type: Battery Adaptercolor:Red+blackMaterial:plasticPackage Contents:1 x MT18MAN Battery AdapterOnly 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.