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Battery LiIon, 10.8/11.1V, 5200mAh for LENOVO ThinkPad T61 (6463)
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T500 W500 R500 9 Cell Battery for IBM Lenovo ThinkPad T61 T61p T60 R61 R61i R60 | Being Patient
Repairing / Unlocking Lenovo T400, T60, T61 batteries 42T5262 – Laptop Battery Chip Reset, Reprogram and Repair – Laptop Battery Analyzer and Repair Forum