Which battery fits the HP EliteBook 645 G9? OEM part numbers

2 batteries are documented for the HP EliteBook 645 G9: M73472-005, M75599-005. 2 of 2 come from OEM documentation (kaas.hpcloud.hp.com); last checked 2026-10-27. Not bench-tested: match the number on your old battery and any constraint before ordering.

Part number	Part	Constraints	Confidence	Last checked
M73472-005	HP 3-cell 51Wh battery M73472-005	OEM documentation only; not bench-tested.	OEM documented	2026-10-27
M75599-005	HP 3-cell 42Wh battery M75599-005	OEM documentation only; not bench-tested.	OEM documented	2026-10-27

Where do these HP EliteBook 645 G9 battery part numbers come from?

2 of 2 fits are from OEM documentation (kaas.hpcloud.hp.com); each row links its source. Last checked 2026-10-27.

Are these batteries tested in the HP EliteBook 645 G9?

No. Fits come from manufacturer or retailer documentation and are not bench-tested. Check the part number on your old part and any listed constraint.

All documented parts for the HP EliteBook 645 G9.

Other parts for the HP EliteBook 645 G9

Keyboard (6) · Cable (20) · Touchpad (2) · Speakers (1) · Heat Sink (1) · Fan (2) · I/O Board (2) · Bottom Cover (3) · RTC Battery (1) · Wireless Card (5) · Fingerprint Reader (3) · Display Bezel (6) · Camera (2) · Screen (7) · Hinge (1) · Display Cable (1) · Display Back Cover (5) · Power Adapter (44) · Power Cord (74) · SSD (10) · Microphone (1) · Antenna (3) · Service Part (16) · Motherboard (11) · Memory (4) · Card Reader (1) · Screw Kit (3)

For AI agents: the same list as JSON from the free MCP server at /mcp (tool get_model_parts, model hp-elitebook-645-g9) or the keyless JSON API.