Tutorial: How to upgrade ram in a T61 Thinkpad - YouTube
Lenovo ThinkPad R61i - RAM Replacement - YouTube
Compatible Laptop Battery for IBM R61 Battery for IBM ThinkPad R61 Series (14.1”widescreen), ThinkPad R61i Series (14.1”widescreen), ThinkPad T61 1959 – 1 Year Warranty – Arikart