Now my ThinkPad R500 with two batteries works up to 5 hours. : r/thinkpad
4GB DDR3-1333 RAM Memory Upgrade for The IBM ThinkPad R500 Series R500 (27183MU) (Genuine A-Tech Brand) at Amazon.com
Specs Lenovo ThinkPad R500 (2714-8TG) 39.1 cm (15.4") Intel® Core™2 Duo T6570 2 GB DDR3-SDRAM 250 GB Intel® GMA 4500MHD Windows Vista Business Laptops (NP28TML)
Who's got one of these big bulky beasts? The Lenovo ThinkPad R500! : r/ thinkpad
OFFTEK 2GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad R500 Series (DDR3-10600) Laptop Memory at Amazon.com
2GB Black Diamond Memory Module for Lenovo ThinkPad R500 2720 DDR3 SO-DIMM 204pin PC3-8500 1066MHz Upgrade - Walmart.com