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Amazon.com: GreenTech New CA06 E7U21UT Replacement Battery for HP Probook 640 G1, 645 G1, 650 G1, 655 G1 - 10.8V 4400mah 48Whr CA06XL HSTNN-LB4Y 718678-421 : Electronics
Amazon.com: HP 738406-001 Palmrest and Touchpad for ProBook 640 G1 645 G1-4 Button - Gray (Renewed) : Electronics
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Amazon.com: HP ProBook 640 G1 14" Laptop, Intel Core i5, 8GB RAM, 128GB SSD, Win10 Home (Renewed) : Electronics
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DC Power Jack Cable For HP ProBook 640 645 G1 727812-SD1 727812-FD1 727812-YD1 | eBay