A-Tech 2GB Memory RAM for Dell Latitude E6420 - DDR3L 1600MHz PC3-12800 Non ECC SO-DIMM 1Rx16 1.35V - Single Laptop & Notebook Upgrade Module (Replacement for A7568815) at Amazon.com
Dell 8GB DDR3L-1600 PC3L-12800 204Pin Sodimm Low Voltage RAM Memory Upgrade P/N SNPN2M64C/8G at Amazon.com