Dr. Battery MPL05283P-11 4-cell 14.8V 2200mAh laptop battery

Replacement Battery for Dell Inspiron and Latitude

This 4-cell lithium-ion unit replaces the original pack in Dell Inspiron 14, 15 and 17 models including 3421, 3437, 3442, 3521, 3531, 3541, 3542, 3543, 3721 and 3737. It also fits Latitude 3440, 3540, E3440 and several listed part numbers such as W6XNM, X29KD and 0MF69. The black housing matches the OEM form factor and installs without tools. Buyers who need a higher-capacity pack or a different voltage should look elsewhere.

Sustained Discharge with Smart Chip Protection

The built-in smart control chip manages charge current to reduce heat during extended use and lowers self-discharge when the laptop is idle. Overheat, short-circuit and overload safeguards activate automatically if current or temperature exceed safe limits. The 2200 mAh cell array delivers 32 Wh of energy, supporting typical office workloads through a full workday. Users running continuous heavy compute or gaming sessions will see shorter runtimes than light productivity.

14.8 V Lithium-Ion Interface Limits

The pack operates at a fixed 14.8 V nominal voltage, so it only works in systems designed for that exact potential. Dell’s battery-detection protocol requires the original pin-out; mismatched connectors will prevent charging or boot. Capacity is limited to 2200 mAh by the four-cell layout, and the chemistry does not support fast-charge protocols beyond the OEM charger’s rate. Laptops expecting a higher cell count or different voltage rail cannot use this unit.