【Multi-Use】Compatible with Dewalt 20v MAX XR DCB203 DCB205 battery, and for Milwaukee M18 Li-ion Battery. 【Well Compatible】Fits well for RIDGID / AEG 18v Cordless Tools, which means you can use your old for Dewalt/Milwaukee batteries to for Ridgid 18V power tools.(WARNING: Not Compatible with RIDGID 18v Advanced Tools). 【Easy to use】It can lock the battery well and easily, perfect fit, safe to use and full of fun. Please remove it from the battery when not in use. 【Notice】This adapter built-in battery lock and Protection electrical board, It can not be used for power tool battery charging, this adapter will not fit into any chargers. 【Warranty & Service】30 Days Money Back, 6 months Warranty, 24 Hours Customer Support, 100% Satisfaction Guarantee, Buy with Confidence! for Ridgid / AEG 18v Cordless Tools