Dr. Battery MPL08251P-26 6-cell 10.8V 4400mAh laptop battery

Replacement battery for HP ProBook series

This Dr. Battery MPL08251P-26 is a new six-cell lithium-ion pack rated at 10.8V and 4400mAh. It replaces original HP part numbers including 633733-241, 633733-251, 633733-321, 633805-001 and 650938-001. The unit fits ProBook 4330s, 4331s, 4430s, 4431s, 4435s, 4436s, 4440s, 4441s, 4446s, 4530s, 4535s, 4540s and 4545s models. Buyers who need a different voltage or connector layout cannot use this pack.

Thermals and power behaviour

The built-in smart control chip manages charging current to reduce heat during recharge and limits power draw while the laptop runs on battery. Integrated safeguards cut output if a short circuit, overheat or overload condition is detected, protecting both the pack and the notebook. Normal operation stays within the 48Wh design envelope without extra cooling requirements. Users who expect active fan cooling or liquid thermal management will not find it here.

Included protections and compatibility checks

The onboard circuitry delivers quicker charging, lower consumption and longer discharge time through its protection logic. A one-year manufacturer warranty covers defects in materials and workmanship. The supplier advises verifying the laptop model, original battery number and output voltage before purchase to avoid mismatches. No software utilities, installation tools or extra cables are bundled. Customers who want a capacity upgrade beyond 4400mAh must look elsewhere.