42T4532 - IBM Lenovo 9-Cell High Capacity Battery 33++ for ThinkPad T400 R400 T60/61 R60/R61
Lenovo ThinkPad T400 2765 Battery (4 Cells)
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
45J7968 IBM Lenovo 4-Cell Li-Ion Battery 33 for ThinkPad T400 R400 T60/61 R60/
Amazon.com: GHU New Battery 73 WH Replacement for 42T5264 42T5265 42t5230 41U3196 41U3197 41U3198 42T4644 42T4531 42T4532 42T4552 42T4677 Compatible with Lenovo IBM ThinkPad R400 T400 T61(Wide Screen) R61 : Electronics
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
Who Knew Thinkpad Batteries Require A Jump Start? | Hackaday