Battery Replacement Kit for the Barnes and Noble NOOK HD 7" BNTV400 Tablet with Installation Video, Tools, and Extended Life Battery Includes Instructional Video, Special Installation Tools, and High Capacity Battery High Capacity 4000 mAh 3.7V Battery Full One Year Warranty Included! Works in Nook HD 7" Tablet Everything You Need to Revive Your Barnes & Noble NOOK HD 7"