Bay Valley Parts 9-Cell 11.1V 7800mAh New Replacement Laptop Battery for SONY VIAO VGN-FW355J/H VGN-FW378J/B VGN-FW41E/H VGN-FW41J/H VGN-FW48E/H VGN-FW50B VGN-FW51B VGN-FW51B/W VGN-FW51JF/H 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-FW355J/H VGN-FW378J/B VGN-FW41E/H VGN-FW41J/H VGN-FW48E/H VGN-FW50B VGN-FW51B VGN-FW51B/W VGN-FW51JF/H VGN-FW51MF VGN-FW51MF/H VGN-FW51ZF VGN-FW51ZF/H VGN-FW52JB VGN-FW54FB This product is CE & RoHS certified, so BUY WITH CONFIDENCE!!!