CMS 8GB (2X4GB) DDR2 5300 667MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with IBM Lenovo® Thinkpad T61, T61P Ddr2 Pc5300 Sodimm - B116
Lenovo ThinkPad R61 14" Laptop For Parts No Keyboard/HDD/RAM/Charger JR | eBay
2GB [1x2GB] Memory RAM Upgrade for the Lenovo ThinkPad R61, R61e, R61i Laptops | eBay
2GB Memory RAM Upgrade for the Lenovo Thinkpad R61 Series, T60 Series, T61 Series, X60 Series and X61 Series Laptops (DDR2-667, PC2-5300, SODIMM) at Amazon.com
IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
Amazon.com: High Performance Battery fit IBM ThinkPad Widescreen R61 R61i T61 T61p T400 R400 Series Laptop 14.1 Inch -Futurebatt : Electronics