HP EliteBook 840 Upgrade RAM SSD Battery

How to Install HP EliteBook 840 G1, G2 Laptop. Upgrades Change Replace, Battery, Memory, Hard Drive, Solid State Drive.
Battery: Genuine HP EliteBook 840 G1 G2 11.4V 50Wh Battery CM03XL
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Crucial 16GB Kit (8GBx2) DDR3/DDR3L 1600 CT2KIT102464BF160B
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SSD list works with this PC.
(1.) Samsung 860 EVO 500GB 2.5 Inch Internal SSD MZ-76E500B/AM)
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(2.) WD Blue 3D NAND 1TB Internal SSD, 2.5" WDS100T2B0A
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(3.) WD Green 1TB Internal PC SSD WDS100T2G0A
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(4.) SanDisk SSD PLUS 480GB Internal SSD SDSSDA-1T00-G26
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(5.) Crucial MX500 250GB 3D NAND SATA CT250MX500SSD1(Z)
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(6.) Samsung 860 PRO SSD 256GB - 2.5 Inch SATA III Internal Solid State Drive
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(7.) Samsung SSD 860 EVO 250GB 2.5 Inch SATA III Internal SSD
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(8.) SanDisk SSD PLUS 240GB Internal SSD
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