New Genuine HP Brobook Battery for 640 G4 / 640 G5 / 645 G4 — 11.4V 48Wh (931702-541, 931702-421)

Brand-new, genuine HP replacement battery designed for Brobook laptops: compatible with HP Brobook 640 G4, 640 G5 and 645 G4. Electrical specifications: 11.4V nominal voltage and 48Wh capacity. Replacement part numbers included: 931702-541 and 931702-421. Ideal as a direct OEM swap to restore original run-time and reliability for the listed models.