The DEWALT Powerstack DCBP518 5.0ah 18v Battery utilises pouch cells to give you greater productivity than before. Get 50% more power* enabling faster application speeds and increased productivity with more than 50% more work per charge** using this battery that works with all the 18V XR tools you already have. This DCBP518 battery provides twice the lifetime*** and features an impact-resistant, overmolded base with non-marring material. Powerstack battery technology - the most powerful, compact and lightest weight battery. The next dimension of power is now available in 5.0ah *vs. DEWALT DCB184 battery, not in application **Usable energy vs. DEWALT DCB184 battery, not in application ***Charge cycles vs. DEWALT DCB184 battery. The DeWalt DCBP034-XJ 18v XR Compact Powerstack.