Siker&reg; 11.10V,7800mAh,Li-ion,Replacement Laptop Battery for Dell Studio 17,Studio 1735,Studio 1737 Series Replacement Notebook Laptop Battery Compatible with KM973,KM974,KM978,MT335,MT342,PW823,PW824,PW835,RM791,RM868,RM870,312-0711,312-0712,312-0708 [11.1V 7800mAh 9-cell]-18months warranty