Laptop Battery Dell Latitude E5540 E5440

dell latitude e6520 Laptop Intel Core i5 2.60 GHz, 8192MB RAM
=============================
Dell Latitude E6520 Laptop Intel Core i5 2.60 GHz, 8192MB RAM, Genuine Windows 7 Pro (64-bit) 320GB HD
8192MB RAM
Genuine Windows 7 Pro
(64-bit)
320GB HD

Dell Latitude E6440 – Core i5 4200M / 2.5 GHz – Windows 7 Pro 64-bit – 4 GB RAM – 320 GB HDD – DVD-Writer – 14″ 1366 x 768 ( HD ) – Intel HD Graphics
=====================
Intel Core 4th Generation i5-4200M Processor (Dual Core, 3M Cache, 2.5 GHz, w/HD Graphics 4600).
320 GB SATA Hard Drive (7200 RPM), 4GB DDR3L at 1600MHz, 8X DVD ROM Drive.
14.0 Inch HD (1366×768) Anti-Glare LED-backlit, Dell Wireless 1506 802.11b/g/n.
Dell ControlVault, Fingerprint Reader, Smartcard and Contactless Smartcard Reader and Express Card.