Specification: 9 cells black li-ion 11.1V 7800mAh black 299.80x49.50x37.60mm 466.85g replacement laptop battery KM973 KM974 MT335 PW823 RM868 RM791 KM976 RM870 KM978 PW824 for Dell Studio 1735 1737 Series. CE UL RoHS certified, safe use.