Labels: DOCUMENTED = taken from HP's manual; PROPOSED = our own joining or ordering of HP's directions, not an HP instruction; UNPERFORMED = a suggested check that has not been carried out.
Applies to
HP EliteBook 820 G4. Confirm the exact model on the service label before starting.
HP EliteBook 820 G4 Notebook PC battery replacement. HP prints this procedure on printed page 35 of its maintenance and service guide.
tools and parts
- Screwdrivers and a non-marking pry tool as HP lists for this procedure
- Static-safe work surface
854109-850- 3-cell, 49 WHr, 4.25 Ah Li-ion battery. Source: printed page 35.
preparation
Save your work and shut the computer down through the operating system, unplug AC power and every external device, and work on a clean, grounded, ESD-protected surface while sorting each screw by its original location. Handle every cable by its connector and put each one back in its own place during reassembly.
replacement
- Power the machine down. (printed page 36).
- Detach all external devices connected to the computer. (printed page 36).
- Cut the power by pulling the cord out of the wall outlet, and (printed page 36).
- Take off the bottom cover (see that procedure on page 30). (printed page 35).
- Take off the battery (see that procedure on page 35). (printed page 36).
- Loosen the 4 captive screws that hold the hard drive to the chassis. (printed page 36).
- Slide the hard drive away from the connector. (printed page 36).
- Lift to remove the hard carefully drive from the bay (3). (printed page 37).
- To take off the hard drive cover from the hard drive, take out the 4 Phillips M3.0×3.0 screws that (printed page 37).
- Fit the replacement part by working back through the printed removal steps (printed page 37).
Part numbers in our catalog
- HP 3-cell battery (854109-850)
Check each part page for its source and variant notes before ordering.
Manufacturer manual
HP Maintenance and Service Guide (PDF, HP). Machine-readable copy: /api/guides/hp-elitebook-820-g4-battery-replacement-p35