Dr. Battery MPL08251P-01 6 Cell 10.8V 4400mAh laptop battery

Replacement battery for HP ProBook series

The Dr. Battery MPL08251P-01 is a new 6-cell lithium-ion pack built to replace original HP part numbers including 633733-151, 633733-241, 633733-251, 633733-321, 633805-001 and 633809-001. It fits ProBook 4330s, 4331s, 4430s, 4431s, 4435s, 4436s, 4440s, 4441s, 4446s, 4530s, 4535s, 4540s and 4545s models. Users who need a direct swap for a worn original will find the correct form factor and voltage.

4400 mAh capacity at 10.8 V delivering 48 Wh

The single specification that decides fit is the 4400 mAh capacity at 10.8 V, which equals 48 Wh and matches the OEM energy rating. A different capacity or voltage would change run time or prevent the laptop from recognising the pack. Verify the original battery part number and the 10.8 V label before ordering to avoid a mismatch.

Sustained discharge with smart-chip protection

A built-in smart control chip manages charge current and balances the six cells during extended use, reducing heat build-up over long sessions. The circuitry enables short-circuit, overheat and overload protections that keep output stable when the system draws power continuously. The result is consistent voltage delivery through a full workday rather than a rapid drop after a short burst.