Dr. Battery MPL08217P-16 6-cell 4400mAh 10.8V laptop battery

Replacement battery for Compaq Presario

This 6-cell lithium-ion unit delivers 4400 mAh at 10.8 V and is built as a direct replacement for a long list of Compaq Presario CQ and HP G, HDX and Pavilion DV models. It arrives new and carries a one-year warranty from Dr. Battery, a brand that has supplied mobile power since 2006. The black housing matches the original aesthetic of the supported notebooks.

Upgrade from a worn or failed original pack

When the factory battery no longer holds a useful charge or shows swelling, this unit restores full runtime without requiring a new laptop. The jump is worth it whenever the original 6-cell pack has degraded below usable capacity and the notebook itself still meets the owner’s performance needs. Buyers who need a higher-capacity 9-cell design or a different voltage should look elsewhere, as this model matches the OEM 10.8 V specification exactly.

Steady output through a full discharge cycle

A built-in smart control chip manages charging current, reduces idle consumption and extends discharge time while protecting against short circuit, overheating and overload. The protection circuitry keeps voltage stable during prolonged workloads rather than allowing the sharp drops seen in unmanaged cells. Consistent regulation means the laptop can run demanding tasks until the pack is truly empty instead of throttling early due to voltage sag.