Connectbuying&reg; PA5107U-1BRS PA5107U Laptop Battery for Toshiba Satellite L50 S55 P55 L55 S55-A5294 Series Laptop PA5107U-1BRS Battery 4Cells for Toshiba Satellite L50 S55 P55 L55 S55-A5294 Series Part Number: PA5107U-1BRS, P/n: P000573230 P000573240 14.4V 2838mAh 43Wh Please be note when first receive please use Power Cable to charge it for few minutes then it will be okay to use.