Lenovo Genuine IBM Lenovo ThinkPad Battery (40Y6799) LENOVO 6CELL PRIMARY NOTEBOOK BATTERY 41+ R60/R60E/R61 15.4-INCH WIDE SCREEN MODELS - 15-INCH STANDARD SCREEN SIZE 15.4-INCH WIDE SCREEN MODELS/R61i 15.4-INCH WIDE SCREEN MODELS AND 15-INCH STANDARD SCREEN MODELS/R500/SL300/SL400/SL500/T60/T60P/T61 14-INCH STANDARD SCREEN SIZE MODELS AND 15.4-INCH WIDE SCREEN MODELS/T500/W500 - 40Y6799 T500 / W500 / R500 / T60 / T61