I hadn't seen anything on this before then I ran into it on Grainger. Looks like a DC500 replacement.
Description
Cordless/Corded Wet-Dry Vacuum, Tank 2 gal., Wet Capacity Yes, Dry Capacity Yes, Length 16 In., Width 12 In., Height 14 In., Washable, Reusable, HEPA Filter, Hose Dimensions 5 ft./1.25 In., Power Cord Length 6 ft., Agency Compliance UL, Includes 5 Heavy-Duty Crush Resistant Hose (1-1/4 In. Diameter); Crevice Tool Attachment; Wide Nozzle Tool Attachment; Filter; Battery & Charger Sold Separately
Link to page:
http://www.grainger.com/Grainger/DEWALT-CordlessCorded-WetDry-Vacuum-34D627?Pid=search