Go to Amazon Sites : br br TOSHIBA Satellite M505-S4940 Laptop Battery - Premium Bavvo? 12-cell Li-ion Battery br br High quality brand-new Li-Ion battery108v 8800mAh12 cells br 30-Day Money Back Guarantee 1 Year Warranty br OEM compatible High capacity battery certified by CE and RoHS Guaranteed to meet or exceed OEM specifications br Before purchase please make sure all the technical specifications and the model No match with your laptop battery