VINTRONS 4000mAh L83-4977-266-01-4, BNA-B0002 Battery Barnes & Noble NOOK BNRV400, BNTV400, NOOK HD 7 Tablet Capacity: 4000mAh / 14.80Wh Type: Li-Polymer Volts: 3.7V Size : 127.90 x 68.75 x 3.70mm Certificated with ISO9001, RoHS & CE;