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
Amazon.com: DR. BATTERY 42T5265 42T5229 42T5225 42T5262 41U3198 Battery for IBM ThinkPad T400 R400 ThinkPad Enchanced T400 Series ThinkPad Widescreen R61 R61i T61 T61p Series 42T4677 43R2499 42T5264 [10.8V/48Wh] : Electronics
Battery for Lenovo ThinkPad T61 R61 T400 R400 T61P 14.1"widescreen Power Charger | eBay