Amazon.com: HP ProBook 4530s 15.6 Inch Business Laptop, Intel Core i3-2330M 2.2GHz, 4G DDR3, 320G, WiFi, VGA, HDMI, Windows 10 Pro 64 Bit Multi-Language Support English/French/Spanish(Renewed) : Electronics
Amazon.com: HP Probook 4510S 4515S 4520S 4525S 4530S 4535S 4540S 4545S New Replacement 15.6" LED LCD Screen Wxga Hd Laptop Di Matte : Electronics
OFFTEK 4GB Replacement Memory RAM Upgrade for HP-Compaq ProBook 4520s (DDR3-8500) Laptop Memory at Amazon.com
Amazon.com: HP Probook 4720s 4520S Blu-ray SuperMulti DVD±R/RW DRIVE 598695-001 : Electronics
Amazon.com: Futurebatt 5200mAh New Laptop Battery for HP ProBook 4525s 4520s 4520 4425s 4421s 4420s 4326s 4325s 4321 4321s 4320 4320s 4320t : Electronics