Specification: Replacement FRU P/N 42T4651 ASM P/N 42T4545 Battery (10.8V 5200mAh/56Wh 6-Cell Li-Ion) for IBM Thinkpad T60 T61 R60 R60E R61 Z60M SL500 Lenovo Thinkpad W500 R61 T60 SL500 T500
Compatible with following laptops:IBM Thinkpad
T60 T61 T60P R60 R60E R61 Lenovo Thinkpad
R61 R61e R61i T61 T61p R500 T500 W500 SL500