No memory effect and virtually no self-discharge for maximum productivity and less downtime, Compatible with all DEWALT 12V XR Li-Ion tools, Lightweight design provides user with better ergonomics, New 12V 2Ah XR Li-Ion DEWALT battery pack provides 50% more runtime than standard 1.3Ah packs, New 12V tools and batteries are 100% compatible with your existing 10.8V products,