Bay Valley Parts 9-Cell 11.1V 7800mAh New Replacement Laptop Battery for SONY VIAO VGN-NW21ZF VGN-NW31EF VGN-NW31EF/W VGN-NW31JF VGN-NW320F/B VGN-NW320F/TC VGN-NW35E VGN-NW35E/B VGN-NW50JB VGN-NW51FB Battery Type: 9 Cells Li-ion Capacity: 11.1V 7800mAh Color: Black (without CD) Using highest quality materials including grade-A brand-new cells Meets and exceeds OEM specifications and lasts longer hours Package Includes: One unit of brand-new replacement laptop battery for SONY VIAO VGN-NW21ZF VGN-NW31EF VGN-NW31EF/W VGN-NW31JF VGN-NW320F/B VGN-NW320F/TC VGN-NW35E VGN-NW35E/B VGN-NW50JB VGN-NW51FB VGN-NW51FB/N VGN-NW51FB/W VGN-NW70JB VGN-NW71FB This product is CE & RoHS certified, so BUY WITH CONFIDENCE!!!