45J7967 - 6-Cell 41+ Replacement Battery Compatible with IBM ThinkPad T60 T61 R60 R61 Z61 T61p T60p T500 W500 SL500 - CPU Medics
IBM ThinkPad T61 6466 LIB200 4400mAh / 48Wh Notebook Battery - BattDepot United States
Premium Power Products Compatible 9 cell 7800 mAh battery for Lenovo Thinkpad R61 T61 For Notebook Battery Rechargeable 7800 mAh 10.8 V DC 1 - Office Depot