New Genuine HP Brobook Battery for 640 G4 / 640 G5 / 645 G4 — 11.4V 48Wh (931719-850)

Original HP replacement battery, brand new and genuine. Compatible with Brobook 640 G4, 640 G5 and 645 G4 laptop models. Electrical specifications: 11.4V and 48Wh. Manufacturer part number: 931719-850. Ideal as a direct-fit OEM replacement to restore battery life and ensure full compatibility with the listed HP models.