Lenovo ThinkPad T420 Intel i5 2nd Gen 14.1" 4GB RAM 320GB HDD Windows 10 (Renewed)
16GB KIT (2 x 8GB) for IBM Lenovo ThinkPad T Series T420 T420i T420s T520 T520i. SO-DIMM DDR3 Non-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com
CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad T420 4177, 4178, 4180, 4236 Series - A13 at Amazon.com
Upgraded the twins today. T420 got 16gb ram and a sled battery. 9cell + sled = 17hrs battery life. T480 got an extra 16gb of ram, up to 32gb. Happy with the
HD] Installing RAM on a Lenovo Thinkpad T420 Guide T410 T400 - YouTube
Lenovo (Renewed) Thinkpad T420-i5-16 GB-320 GB 14-inch Laptop (2nd Gen Core i5/16GB/320GB/Windows 7/Integrated Graphics), Black : Amazon.in: Computers & Accessories