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Black rectangular laptop battery with six lithium-ion cells

Dr. Battery

Dr. Battery MPL05271P-03 6-cell 11.1V 4400mAh laptop battery

SKU CH-NQZX-YYD6R

Replaces Dell Inspiron batteries with a 6-cell 11.1V 4400mAh lithium-ion pack

  • ColorBlack
  • TypeBattery
  • CompatibilityDell Inspiron 14(3421) / 14(3437) / 14(3442) / 14R(5421) / 1
  • Battery Type6 Cell Lithium-Ion
  • Battery Voltage11.1V
  • Battery Capacity4400 mAh
  • Replaces original Dell batteries across 3, 14, 15 and 17-inch Inspiron models
  • 6-cell lithium-ion design delivers 11.1V at 4400mAh for extended runtime
  • Built-in smart chip enables quicker charging and longer discharge cycles
  • Safety protections guard against short circuit, overheat and overload
  • New condition with one-year manufacturer warranty included

Replacement battery for Dell Inspiron 14/15/17

The Dr. Battery MPL05271P-03 is a new six-cell lithium-ion pack rated at 11.1 V and 4400 mAh. It replaces original Dell batteries such as 0MF69, 24DRM, 312-1387, 312-1390, 312-1392 and 312-1433. The unit fits a wide range of Inspiron 14, 15 and 17 models from the 3421, 3521, 3721 and related series. Buyers seeking a direct swap for a worn-out factory battery will find the correct voltage and connector here.

Upgrading from a depleted or swollen pack

If the original battery no longer holds charge, shows reduced runtime or has physically expanded, this replacement restores the laptop to its designed 49 Wh capacity. The jump is worth it when the machine otherwise meets your needs but is tethered to an outlet. It is not for users who need a higher-capacity 9-cell design or a different voltage platform; the cell count and voltage are fixed at six cells and 11.1 V.

Verify model number and original part code before

Check the label on your existing battery for the exact Dell part number — common codes include 451-12107, 451-12108, 49VTP, 4DMNG, 4WY7C, G019Y and MR90Y — and confirm the laptop model appears in the supported list such as Inspiron 3421, 3437, 3442, 3531, 3541, 3542, 3543, 5421, 5521, 5537, 5721, 5737 or 5748. Ensure the output voltage printed on the old pack reads 11.1 V; a mismatch means this unit will not fit or function correctly.

Highlights

  • Replaces original Dell batteries across 3, 14, 15 and 17-inch Inspiron models
  • 6-cell lithium-ion design delivers 11.1V at 4400mAh for extended runtime
  • Built-in smart chip enables quicker charging and longer discharge cycles
  • Safety protections guard against short circuit, overheat and overload
  • New condition with one-year manufacturer warranty included

Specifications

BrandDr. Battery
ModelMPL05271P-03
ColorBlack
TypeBattery
CompatibilityDell Inspiron 14(3421) / 14(3437) / 14(3442) / 14R(5421) / 15(3521) / 15(3531) / 15(3541) / 15(3542) / 15(3543) / 15R(5521) / 15R(5537) / 17(3721) / 17(5748) / 17R(5721) / 17R(5737)
Dell Inspiron 3421 / 3437 / 3443 / 3521 / 3531 / 3537 / 3543 / 3721 / 5749 / 3847 / 5421 / 5437 / 5521 / 5537 / 5721 / 5749 / 7447
Dell Latitude 3440 / 3540 / E3440
Dell Vostro 2421 / 2521 / 3445 / 3446 / 3449 / 3546 / 3549
Original Battery Part Number :
0MF69 / 24DRM / 312-1387 / 312-1390 / 312-1392 / 312-1433 / 451-12107 / 451-12108 / 49VTP / 4DMNG / 4WY7C / G019Y / MR90Y / V8VNT / XCMRD / YGMTN
*** Not
Battery Type6 Cell Lithium-Ion
Battery Voltage11.1V
Battery Capacity4400 mAh

Questions about this item

What laptop models does the 6-cell 11.1V 4400mAh battery fit?

The battery is listed as compatible with Dell Inspiron 14 (3421, 3437, 3442, 3443), 14R (5421), 15 (3521, 3531, 3541, 3542, 3543), 15R (5521, 5537), 17 (3721, 5748) and 17R (5721, 5737).

How do I install the battery and what step is often missed?

Power off the laptop, unplug the AC adapter, slide the release latch, remove the old pack, insert the new battery until it clicks, then charge fully before first use; the step often missed is the initial full charge.

What maintenance or replacement will the 6-cell lithium-ion battery need later?

Lithium-ion cells degrade with age and cycle count; when run time drops noticeably, replace the pack with a matching 11.1V 4400mAh unit.

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