Battery Replacement Kit for the Barnes and Noble NOOK 3G+WiFi BNRZ100 with Installation Video, Tools, and Extended Life Battery. Guaranteed for One Full Year High Capacity 1250 mAh 3.7V Battery Works in NOOK 3G+WiFi BNRZ100 eReaders Comes with Battery, Tools, and DVD Video Instructions Kit Includes Everything You Need to Revive Your Barnes & Noble NOOK 3G+WiFi BNRZ100 non-color eReader.