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
4GB DDR3L Low Voltage 1600 MHz (PC3-12800) CL11 SODIMM - Notebook RAM | Dell USA
16GB Kit (2 x 8GB) DDR3L-1600 (PC3-12800) SODIMM DR x8 Memory RAM for Dell