Dr. Battery MPL10244P-15 6-cell 11.1V 4400mAh laptop battery

Replacement battery for ThinkPad X131e and X140e

This 6-cell lithium-ion pack is built as a direct replacement for multiple Lenovo ThinkPad models including the X121e, X130e, X131e and X140e series. It matches the original 11.1V specification and 4400mAh capacity to restore factory runtime. The unit is new and carries a one-year warranty from the manufacturer.

Practical limits of the 11.1V lithium-ion standard

The chemistry delivers a nominal 11.1V across six cells, which fixes the energy ceiling at 49Wh for this capacity class. Voltage drops as the pack discharges, so sustained loads near the current limit will reduce usable runtime. The integrated protection circuit stops charging at the safety threshold and cuts output on short circuit, overheat or overload events.

4400mAh capacity and typical headroom

A 49Wh pack of this size typically powers a compatible ThinkPad through several hours of light office work or video playback. Heavy multi-core workloads, maximum screen brightness or attached peripherals will drain it faster. The smart control chip optimises charge cycles for longer service life, but the physical cell count means the pack cannot match higher-capacity 9-cell alternatives.